Editor lists and custom property drawers break after updating to unity 2021.3.4f1

I recently updated my project from unity 2021.1.12f1 to unity 2021.3.4f1 in order to access new functionality for some shaders, as well as bring my project over to an editor that has LTS. However, on doing this it has caused all my arrays of classes to break. I've already tried restarting unity, restarting my computer, copying the project file into a new project, uninstalling and reinstalling the editor, and doing a reimport all of everything in my project. Any help would be greatly appreciated!

It's worth noting that hovering over the gameobject input fields highlights them, but clicking does nothing and no components of the script are interactable. Additionally, I cannot scroll despite their being contents passed the botttom of the screen. Opening the script in its own window does not fix the problem either. I don't use any custom editor scripts for this.
Thank you!

 

This bug has been posted/reported a few times now. Though doesn't make this regression any less of a pain. I believe the temp-fix is to use [NonReordable] on the collection.

 

You rock, spiney. I hope they fix soon. Its really cool to have reorderable lists....

 

Well good news, on the latest 2020 and 2021 LTS versions this has been fixed.