(Case 1033895) Removing CanvasScaler corrupts UI, which cannot be undone

Unity Engine
1

It is possible to corrupt the UI by removing a CanvasScaler Component. The UI corruption is not reversible, Undo does not work.

Reproduce

  • Open Assets/Scene.unity
  • Move “Canvas 2” into “Canvas 1” in Hierarchy window
  • Select “Canvas 2” and remove the “CanvasScaler” Component

=> Observe how this affects the size of the green image, which is part of “Canvas 1”.

  • Click “Edit > Undo”

=> Observe it undoes the blue image size, but the green image size keeps too big (corrupted).

Expected

  • Removing the CanvasScaler Component of Canvas 2 should not affect elements of Canvas 1?
  • Undo functionality should work always, it should properly undo both, the green and blue image sizes.
1 Like
2

Only 2018.2?

3

QA was able to reproduce the issue, good job! It has been added to the public issue tracker now:
https://issuetracker.unity3d.com/issues/ui-removing-or-disabling-canvasscaler-corrupts-ui-which-cannot-be-undone

According to the report in the public issue tracker, QA was able to reproduce this issue with various earlier versions than 2018.2.

1 Like