This is hardly a bug; more of a general nitpick which I only think is worth mentioning because it catches me out basically every time I use the F2 menu, and since I'm doing a fair bit of testing* with it at the moment I just felt it was worth mentioning.
Basically, the dropdown arrows for each pack don't "acknowledge" the cursor; you have to position it on the line
adjacent to the arrow, which seems a bit counter-intuitive. Note that I am using NL scaling and CursorResize is set to 1.
(For these screenshots, the cursor has been added in afterwards to show its position):
Positioning the cursor over the arrow doesn't highlight the dropdown...
The cursor has to be over the line to the right of the arrow for it to highlight, and thus function
*
I'm doing a mass replay check today so I'll add some feedback here regarding 12.12.3's progress tracking once complete.