diff --git a/src/main/java/io/reactivex/rxjava3/core/Flowable.java b/src/main/java/io/reactivex/rxjava3/core/Flowable.java
index b7781c57f8..d9cea6954f 100644
--- a/src/main/java/io/reactivex/rxjava3/core/Flowable.java
+++ b/src/main/java/io/reactivex/rxjava3/core/Flowable.java
@@ -8970,13 +8970,15 @@ public final Flowable<T> debounce(long timeout, @NonNull TimeUnit unit, @NonNull
      * @throws NullPointerException if {@code unit} or {@code scheduler} is {@code null} or {@code onDropped} is {@code null}
      * @see <a href="http://reactivex.io/documentation/operators/debounce.html">ReactiveX operators documentation: Debounce</a>
      * @see <a href="https://github.com/ReactiveX/RxJava/wiki/Backpressure">RxJava wiki: Backpressure</a>
-     * @see #throttleWithTimeout(long, TimeUnit, Scheduler)
+     * @see #throttleWithTimeout(long, TimeUnit, Scheduler, Consumer)
+     * @since 3.1.6 - Experimental
      */
     @CheckReturnValue
     @NonNull
     @BackpressureSupport(BackpressureKind.ERROR)
     @SchedulerSupport(SchedulerSupport.CUSTOM)
-    public final Flowable<T> debounce(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<T> onDropped) {
+    @Experimental
+    public final Flowable<T> debounce(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<? super T> onDropped) {
         Objects.requireNonNull(unit, "unit is null");
         Objects.requireNonNull(scheduler, "scheduler is null");
         Objects.requireNonNull(onDropped, "onDropped is null");
@@ -17640,7 +17642,7 @@ public final Flowable<T> throttleWithTimeout(long timeout, @NonNull TimeUnit uni
     /**
      * Returns a {@code Flowable} that mirrors the current {@code Flowable}, except that it drops items emitted by the
      * current {@code Flowable} that are followed by newer items before a timeout value expires on a specified
-     * {@link Scheduler}. The timer resets on each emission (alias to {@link #debounce(long, TimeUnit, Scheduler)}).
+     * {@link Scheduler}. The timer resets on each emission (alias to {@link #debounce(long, TimeUnit, Scheduler, Consumer)}).
      * <p>
      * <em>Note:</em> If items keep being emitted by the current {@code Flowable} faster than the timeout then no items
      * will be emitted by the resulting {@code Flowable}.
@@ -17668,13 +17670,15 @@ public final Flowable<T> throttleWithTimeout(long timeout, @NonNull TimeUnit uni
      * @throws NullPointerException if {@code unit} or {@code scheduler} is {@code null} or {@code onDropped} is {@code null}
      * @see <a href="http://reactivex.io/documentation/operators/debounce.html">ReactiveX operators documentation: Debounce</a>
      * @see <a href="https://github.com/ReactiveX/RxJava/wiki/Backpressure">RxJava wiki: Backpressure</a>
-     * @see #debounce(long, TimeUnit, Scheduler)
+     * @see #debounce(long, TimeUnit, Scheduler, Consumer)
+     * @since 3.1.6 - Experimental
      */
     @CheckReturnValue
     @BackpressureSupport(BackpressureKind.ERROR)
     @SchedulerSupport(SchedulerSupport.CUSTOM)
     @NonNull
-    public final Flowable<T> throttleWithTimeout(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<T> onDropped) {
+    @Experimental
+    public final Flowable<T> throttleWithTimeout(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<? super T> onDropped) {
         return debounce(timeout, unit, scheduler, onDropped);
     }
 
diff --git a/src/main/java/io/reactivex/rxjava3/core/Observable.java b/src/main/java/io/reactivex/rxjava3/core/Observable.java
index 5bb6508994..792b740104 100644
--- a/src/main/java/io/reactivex/rxjava3/core/Observable.java
+++ b/src/main/java/io/reactivex/rxjava3/core/Observable.java
@@ -7933,12 +7933,14 @@ public final Observable<T> debounce(long timeout, @NonNull TimeUnit unit, @NonNu
      * @return the new {@code Observable} instance
      * @throws NullPointerException if {@code unit} or {@code scheduler} is {@code null} } or {@code onDropped} is {@code null}
      * @see <a href="http://reactivex.io/documentation/operators/debounce.html">ReactiveX operators documentation: Debounce</a>
-     * @see #throttleWithTimeout(long, TimeUnit, Scheduler)
+     * @see #throttleWithTimeout(long, TimeUnit, Scheduler, Consumer)
+     * @since 3.1.6 - Experimental
      */
     @CheckReturnValue
     @SchedulerSupport(SchedulerSupport.CUSTOM)
     @NonNull
-    public final Observable<T> debounce(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<T> onDropped) {
+    @Experimental
+    public final Observable<T> debounce(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<? super T> onDropped) {
         Objects.requireNonNull(unit, "unit is null");
         Objects.requireNonNull(scheduler, "scheduler is null");
         Objects.requireNonNull(onDropped, "onDropped is null");
@@ -14671,12 +14673,14 @@ public final Observable<T> throttleWithTimeout(long timeout, @NonNull TimeUnit u
      * @return the new {@code Observable} instance
      * @throws NullPointerException if {@code unit} or {@code scheduler} is {@code null} or {@code onDropped} is {@code null}
      * @see <a href="http://reactivex.io/documentation/operators/debounce.html">ReactiveX operators documentation: Debounce</a>
-     * @see #debounce(long, TimeUnit, Scheduler)
+     * @see #debounce(long, TimeUnit, Scheduler, Consumer)
+     * @since 3.1.6 - Experimental
      */
     @CheckReturnValue
     @SchedulerSupport(SchedulerSupport.CUSTOM)
     @NonNull
-    public final Observable<T> throttleWithTimeout(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<T> onDropped) {
+    @Experimental
+    public final Observable<T> throttleWithTimeout(long timeout, @NonNull TimeUnit unit, @NonNull Scheduler scheduler, @NonNull Consumer<? super T> onDropped) {
         return debounce(timeout, unit, scheduler, onDropped);
     }
 
diff --git a/src/main/java/io/reactivex/rxjava3/internal/operators/flowable/FlowableDebounceTimed.java b/src/main/java/io/reactivex/rxjava3/internal/operators/flowable/FlowableDebounceTimed.java
index 086dd6c1fd..b9e5dff7f3 100644
--- a/src/main/java/io/reactivex/rxjava3/internal/operators/flowable/FlowableDebounceTimed.java
+++ b/src/main/java/io/reactivex/rxjava3/internal/operators/flowable/FlowableDebounceTimed.java
@@ -34,9 +34,9 @@ public final class FlowableDebounceTimed<T> extends AbstractFlowableWithUpstream
     final long timeout;
     final TimeUnit unit;
     final Scheduler scheduler;
-    final Consumer<T> onDropped;
+    final Consumer<? super T> onDropped;
 
-    public FlowableDebounceTimed(Flowable<T> source, long timeout, TimeUnit unit, Scheduler scheduler, Consumer<T> onDropped) {
+    public FlowableDebounceTimed(Flowable<T> source, long timeout, TimeUnit unit, Scheduler scheduler, Consumer<? super T> onDropped) {
         super(source);
         this.timeout = timeout;
         this.unit = unit;
@@ -58,7 +58,7 @@ static final class DebounceTimedSubscriber<T> extends AtomicLong
         final long timeout;
         final TimeUnit unit;
         final Scheduler.Worker worker;
-        final Consumer<T> onDropped;
+        final Consumer<? super T> onDropped;
 
         Subscription upstream;
 
@@ -68,7 +68,7 @@ static final class DebounceTimedSubscriber<T> extends AtomicLong
 
         boolean done;
 
-        DebounceTimedSubscriber(Subscriber<? super T> actual, long timeout, TimeUnit unit, Worker worker, Consumer<T> onDropped) {
+        DebounceTimedSubscriber(Subscriber<? super T> actual, long timeout, TimeUnit unit, Worker worker, Consumer<? super T> onDropped) {
             this.downstream = actual;
             this.timeout = timeout;
             this.unit = unit;
@@ -93,14 +93,14 @@ public void onNext(T t) {
             long idx = index + 1;
             index = idx;
 
-            Disposable d = timer;
-            if (d != null) {
-                d.dispose();
+            DebounceEmitter<T> currentEmitter = timer;
+            if (currentEmitter != null) {
+                currentEmitter.dispose();
             }
 
-            if (onDropped != null && timer != null) {
+            if (onDropped != null && currentEmitter != null) {
                 try {
-                    onDropped.accept(timer.value);
+                    onDropped.accept(currentEmitter.value);
                 } catch (Throwable ex) {
                     Exceptions.throwIfFatal(ex);
                     upstream.cancel();
@@ -110,10 +110,9 @@ public void onNext(T t) {
                 }
             }
 
-            DebounceEmitter<T> de = new DebounceEmitter<>(t, idx, this);
-            timer = de;
-            d = worker.schedule(de, timeout, unit);
-            de.setResource(d);
+            DebounceEmitter<T> newEmitter = new DebounceEmitter<>(t, idx, this);
+            timer = newEmitter;
+            newEmitter.setResource(worker.schedule(newEmitter, timeout, unit));
         }
 
         @Override
diff --git a/src/main/java/io/reactivex/rxjava3/internal/operators/observable/ObservableDebounceTimed.java b/src/main/java/io/reactivex/rxjava3/internal/operators/observable/ObservableDebounceTimed.java
index 48861a778e..f2db191229 100644
--- a/src/main/java/io/reactivex/rxjava3/internal/operators/observable/ObservableDebounceTimed.java
+++ b/src/main/java/io/reactivex/rxjava3/internal/operators/observable/ObservableDebounceTimed.java
@@ -29,9 +29,9 @@ public final class ObservableDebounceTimed<T> extends AbstractObservableWithUpst
     final long timeout;
     final TimeUnit unit;
     final Scheduler scheduler;
-    final Consumer<T> onDropped;
+    final Consumer<? super T> onDropped;
 
-    public ObservableDebounceTimed(ObservableSource<T> source, long timeout, TimeUnit unit, Scheduler scheduler, Consumer<T> onDropped) {
+    public ObservableDebounceTimed(ObservableSource<T> source, long timeout, TimeUnit unit, Scheduler scheduler, Consumer<? super T> onDropped) {
         super(source);
         this.timeout = timeout;
         this.unit = unit;
@@ -51,7 +51,7 @@ static final class DebounceTimedObserver<T>
         final long timeout;
         final TimeUnit unit;
         final Scheduler.Worker worker;
-        final Consumer<T> onDropped;
+        final Consumer<? super T> onDropped;
 
         Disposable upstream;
 
@@ -61,7 +61,7 @@ static final class DebounceTimedObserver<T>
 
         boolean done;
 
-        DebounceTimedObserver(Observer<? super T> actual, long timeout, TimeUnit unit, Worker worker, Consumer<T> onDropped) {
+        DebounceTimedObserver(Observer<? super T> actual, long timeout, TimeUnit unit, Worker worker, Consumer<? super T> onDropped) {
             this.downstream = actual;
             this.timeout = timeout;
             this.unit = unit;
@@ -85,12 +85,12 @@ public void onNext(T t) {
             long idx = index + 1;
             index = idx;
 
-            Disposable d = timer;
-            if (d != null) {
-                d.dispose();
+            DebounceEmitter<T> currentEmitter = timer;
+            if (currentEmitter != null) {
+                currentEmitter.dispose();
             }
 
-            if (onDropped != null && timer != null) {
+            if (onDropped != null && currentEmitter != null) {
                 try {
                     onDropped.accept(timer.value);
                 } catch (Throwable ex) {
@@ -101,10 +101,9 @@ public void onNext(T t) {
                 }
             }
 
-            DebounceEmitter<T> de = new DebounceEmitter<>(t, idx, this);
-            timer = de;
-            d = worker.schedule(de, timeout, unit);
-            de.setResource(d);
+            DebounceEmitter<T> newEmitter = new DebounceEmitter<>(t, idx, this);
+            timer = newEmitter;
+            newEmitter.setResource(worker.schedule(newEmitter, timeout, unit));
         }
 
         @Override