After being unable to reach the end of layer lists , now comes a new oddity whereby the layer list in the Properties panel closes-up automatically if you release the press of the LMB.
This makes changing the layer property SUPER-annoying.
I can’t reproduce it here either in 8.20.25140.13001 - I made 100 layers and then hit the dropdown in Properties - it stays open here and has a scrollbar. One thing I do note is the scrollbar in that dropdown is not active - you can’t click on it with the mouse and scroll it - you can only use the mouse wheel to scroll.