I didn't change anything in the demo scene, other than set up URP. I just click on Nolan and it starts spamming.The error that you are receiving is the cause. What is null on 536 of ItemSetManagerBaseInspector? If you do an EditorPrefs.DeleteAll does it fix the issue?
Removing this line (470) fixes the issue though.
C#:
m_ReorderableItemSetStateList[m_ItemSetListIndex].index = -1;
It must be. Scrolling through inspector with large size reorderable lists (such as that in the demo character) is also painfully choppy on both 2021.3 and 2022.1, a lot slower than on 2020.3LTS. I guess I'll stay on that one for now.+1 I have the same issue. Regardless of pipeline. I figure it has to do with unity screwing up the reorderable lists, yet again