diff --git a/packages/block-editor/src/components/button-block-appender/style.scss b/packages/block-editor/src/components/button-block-appender/style.scss
index d1fab4f438e3e..7db34b7cfbd17 100644
--- a/packages/block-editor/src/components/button-block-appender/style.scss
+++ b/packages/block-editor/src/components/button-block-appender/style.scss
@@ -36,8 +36,9 @@
 .block-list-appender:only-child {
 	.is-layout-constrained.block-editor-block-list__block:not(.is-selected) > &,
 	.is-layout-flow.block-editor-block-list__block:not(.is-selected) > &,
-	.is-layout-constrained.block-editor-block-list__block:not(.is-selected) > .block-editor-block-list__layout > &,
-	.is-layout-flow.block-editor-block-list__block:not(.is-selected) > .block-editor-block-list__layout > & {
+	// Legacy groups have an inner container so need to be targeted separately
+	.is-layout-constrained.block-editor-block-list__block:not(.is-selected) > .wp-block-group__inner-container > &,
+	.is-layout-flow.block-editor-block-list__block:not(.is-selected) > .wp-block-group__inner-container > & {
 		pointer-events: none;
 
 		&::after {