ID Pallet Sizes Now Larger?

Hi - Wondering if anyone else has see this. Not sure what update did this, but my pallets no longer fit on my second display. They appear to be wider and longer. I'm on an iMac running Big Sur and have a secondary HP display that is rotated 90°. I had all my relevant pallets packed onto the second display and all the sudden, they are overlapping side-to-side and running off the bottom of the screen. I've tried resetting that workspace, and even redoing from scratch, but the same layout of pallets will not fit as they did. 

Thoughts?