Using Unity 2021.3.30f1 LTS The problem occurs when I create a TextMeshProUGUI that includes a TMP SubMeshUI. After creating this, if I attempt to undo the creation operation, Unity will crash without fail. Here are the steps to reproduce this issue: Create a TextMeshProUGUI with a TMP SubMeshUI. Attempt to undo the creation of the TextMeshProUGUI(Ctrl +Z). After the second step, Unity crashes consistently. This issue has significantly affected my workflow, and I am unable to find a workaround.If anyone else has encountered this issue, please tell me how to solve it. Thanks!