🐛 Hovering fast on multiple Tooltips throws AnimationController error

[harlanx]

Describe the bug
On desktop, hover status is used for displaying Tooltip. However, issue arises when the specified waitDuration is set to Duration.zero and when multiple widgets with their own tooltips are hovered fast.

To Reproduce
Steps to reproduce the behavior:

1. Set waitDuration to Duration(milliseconds: 50) or below (The lower, the faster you can reproduce the issue).
2. Create a list of widgets wrapped in Tooltip widget
3. Hover continuously and fast between those widgets with tooltips
4. See error

Expected behavior
By design choice and better user experience, waitDuration should be set to where the tooltip would not popup instantly however the issue should still be addressed for those who decide to use a lower duration and is expected without encountering any error.

Additional context

Sample code

              TooltipTheme(
                data: const TooltipThemeData(
                  waitDuration: Duration.zero,
                ),
                child: Row(
                  children: [
                    for (final color in material.Colors.primaries)
                      Tooltip(
                        message: color.toString(),
                        child: Container(
                          color: color,
                          height: 25,
                          width: 25,
                        ),
                      ),
                  ],
                ),
              ),

Debug

══╡ EXCEPTION CAUGHT BY ANIMATION LIBRARY ╞═════════════════════════════════════════════════════════
The following assertion was thrown while notifying status listeners for AnimationController:
'package:flutter/src/widgets/overlay.dart': Failed assertion: line 162 pos 12: '_overlay != null':
is not true.

When the exception was thrown, this was the stack:
#2      OverlayEntry.remove (package:flutter/src/widgets/overlay.dart:162:12)
#3      _TooltipState._removeEntry (package:fluent_ui/src/controls/surfaces/tooltip.dart:395:15)
#4      _TooltipState._handleStatusChanged (package:fluent_ui/src/controls/surfaces/tooltip.dart:229:7)
#5      AnimationLocalStatusListenersMixin.notifyStatusListeners (package:flutter/src/animation/listener_helpers.dart:240:19)
#6      AnimationController._checkStatusChanged (package:flutter/src/animation/animation_controller.dart:815:7)
#7      AnimationController.value= (package:flutter/src/animation/animation_controller.dart:364:5)
#8      AnimationController.forward (package:flutter/src/animation/animation_controller.dart:459:7)
#9      _TooltipState._revealTooltip (package:fluent_ui/src/controls/surfaces/tooltip.dart:292:17)
#10     Tooltip._revealLastTooltip (package:fluent_ui/src/controls/surfaces/tooltip.dart:119:28)
#11     _TooltipState._removeEntry (package:fluent_ui/src/controls/surfaces/tooltip.dart:400:15)
#12     _TooltipState._handleStatusChanged (package:fluent_ui/src/controls/surfaces/tooltip.dart:229:7)
#13     AnimationLocalStatusListenersMixin.notifyStatusListeners (package:flutter/src/animation/listener_helpers.dart:240:19)
#14     AnimationController._checkStatusChanged (package:flutter/src/animation/animation_controller.dart:815:7)
#15     AnimationController.value= (package:flutter/src/animation/animation_controller.dart:364:5)
#16     AnimationController.forward (package:flutter/src/animation/animation_controller.dart:459:7)
#17     _TooltipState._revealTooltip (package:fluent_ui/src/controls/surfaces/tooltip.dart:292:17)
#18     _TooltipState.ensureTooltipVisible (package:fluent_ui/src/controls/surfaces/tooltip.dart:308:7)
#22     _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:189:12)
(elided 5 frames from class _AssertionError, class _Timer, and dart:async-patch)

The AnimationController notifying status listeners was:
  AnimationController#f0ba4(⏮ 0.000; paused)