Here are just a few bugs I found to help the adobe team out.
1.) Eyedropper Tool "Current and Below" not working properly
The eyedropper tool for sampling colors on "current layer and below" doesnt always work when my layers are inside of a group folder with a cliping mask added to that folder. This bug actually has been going on for several versions of photoshop too Mac/and PC.
2.) New View> Flip Horizontal Dual Windows Bug When using the new View>Flip Horizontal with a second window. If you keep flipping that 2nd window after awhile it seems to mess with the UI of photoshop causing UI glitches/slowdown. Like for example the layers panel and other windows start acting up and freezing. This happens to me on my Mac at work, but I dont think I got it to happen much on my windows PC at home.
3.) New Color Wheel Bug For me I have my panels pinned to the side with Color slider at top, Brush panel in middle, and layers at the bottom. When I switch Color Slider to Color Wheel it collapses my layer panel and I cant get it back open unless I switch back to color slider, or unpin the layers panel. I only tested this problem on my PC