Force a draw pass when a layer is detached

Author: MatkovIvan

compose/ui/ui/src/skikoMain/kotlin/androidx/compose/ui/scene/BaseComposeScene.skiko.kt

@@ -82,12 +82,15 @@ internal abstract class BaseComposeScene(
             }
         }
 
-    protected fun invokeInvalidationCallbacks() {
+    protected fun invokeInvalidationCallbacks(
+        forceLayout: Boolean = false,
+        forceDraw: Boolean = false,
+    ) {
         if (isInvalidationDisabled || isClosed || composition == null) return
-        if (hasPendingMeasureOrLayout) {
+        if (forceLayout || hasPendingMeasureOrLayout) {
             invalidateLayout()
         }
-        if (hasPendingDraw) {
+        if (forceDraw || hasPendingDraw) {
             invalidateDraw()
         }
     }

compose/ui/ui/src/skikoMain/kotlin/androidx/compose/ui/scene/CanvasLayersComposeScene.skiko.kt

@@ -528,7 +528,9 @@ private class CanvasLayersComposeSceneImpl(
         onOwnerRemoved(layer.owner)
 
         inputHandler.onPointerUpdate()
-        invokeInvalidationCallbacks()
+        // Removing a layer changes the scene's composited output (e.g. it removes a dialog scrim)
+        // without dirtying any remaining owner, so force a draw pass to repaint without it.
+        invokeInvalidationCallbacks(forceDraw = true)
     }
 
     private fun requestFocus(layer: AttachedComposeSceneLayer) {