fix(identity): stop a leaving surface from taking back

identity/src/main/kotlin/de/jeanlucmakiola/floret/identity/Motion.kt

@@ -87,7 +87,8 @@ fun Modifier.animateContentSizeMotion(reduceMotion: Boolean = rememberReduceMoti
  *   the surface leaves and dropped the moment it is shown again, so reopening it
  *   mid-exit never starts from the shrunk state; a back that leaves it visible
  *   settles back. Null when the caller doesn't track it: the preview is then held
- *   for a fixed time before settling back.
+ *   for a fixed time before settling back. A surface that is leaving no longer
+ *   takes back, so a second press reaches the screen underneath.
  */
 @Composable
 fun Modifier.predictiveBack(
@@ -104,7 +105,7 @@ fun Modifier.predictiveBack(
         if (visible == true) progress.snapTo(0f)
     }
 
-    PredictiveBackHandler(enabled = enabled) { events ->
+    PredictiveBackHandler(enabled = enabled && visible != false) { events ->
         try {
             events.collect { event ->
                 fromLeftEdge = event.swipeEdge == BackEventCompat.EDGE_LEFT