Fix last frame again

Author: pomber

packages/mini-editor/src/mini-editor-tween.tsx

@@ -275,8 +275,11 @@ function endingPosition(
   } = getStepFiles(prev, next, false)
 
   // getStepFiles return the intermediate files, we need to patch the ending state (2to1south)
-  if (!inputSouthPanel && nextSouthFile) {
-    nextNorthFile = nextSouthFile
+  const isTwoToOneSouth =
+    !inputSouthPanel &&
+    inputNorthPanel.active === prev?.southPanel?.active
+  if (isTwoToOneSouth) {
+    nextNorthFile = nextSouthFile!
   }
 
   return {