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 45358b9a0f050..d1fab4f438e3e 100644
--- a/packages/block-editor/src/components/button-block-appender/style.scss
+++ b/packages/block-editor/src/components/button-block-appender/style.scss
@@ -48,6 +48,7 @@
 			bottom: 0;
 			left: 0;
 			pointer-events: none;
+			border: $border-width dashed currentColor;
 			@include placeholder-style();
 		}
 
diff --git a/packages/block-library/src/group/editor.scss b/packages/block-library/src/group/editor.scss
index a743b0abd2644..375a80be9c0f8 100644
--- a/packages/block-library/src/group/editor.scss
+++ b/packages/block-library/src/group/editor.scss
@@ -42,6 +42,7 @@
 		flex: 1 0 $grid-unit-60;
 		pointer-events: none;
 		min-height: $grid-unit-60 - $border-width - $border-width;
+		border: $border-width dashed currentColor;
 		@include placeholder-style();
 	}
 
diff --git a/packages/block-library/src/navigation/editor.scss b/packages/block-library/src/navigation/editor.scss
index 2e63b25ac72e0..1658c90fa38f1 100644
--- a/packages/block-library/src/navigation/editor.scss
+++ b/packages/block-library/src/navigation/editor.scss
@@ -291,6 +291,7 @@ $color-control-label-height: 20px;
 		bottom: 0;
 		left: 0;
 		pointer-events: none;
+		border: $border-width dashed currentColor;
 		@include placeholder-style();
 
 		// Inherit border radius from style variations.