Bug UnityEvent captures all drop events in Inspector

I have had an ongoing issue with UnityEvent properties capturing all drop items in the inspector.

Here is a quick video demonstrating the problem:

There is no custom inspector being used.
I just updated to 2021.3.26f1 to see if this has been fixed. It hasn't.
I did have Odin installed, but I removed this in case it was the problem. It wasn't.
I don't have any other packages installed that might cause this behaviour.

 

Solved: I was on an old version of Infinity Tools, Ultimate Editor Enhancer, 3.01.1. Upgrading to the latest version fixed this.