Prevent hidden CCS opening overlays

scripts/ui/ccs_player.gd

@@ -435,6 +435,7 @@ func on_show(payload: Variant = null) -> void:
 
 func on_hide() -> void:
 	timer.stop()
+	opening_active = false
 	_dismiss_dialogs()
 
 
@@ -458,6 +459,12 @@ func _ccs_dialogs() -> Array[Window]:
 
 
 func _render() -> void:
+	# This screen stays subscribed to the shared CCS attempt while hidden.
+	# Never allow its Window-based dialogs to appear over CCS Cases 2.
+	if not visible:
+		opening_active = false
+		_dismiss_dialogs()
+		return
 	var attempt: Dictionary = CCSService.attempt
 	if attempt.is_empty():
 		return