
Just updated to Photoshop 27.1.0 because I wanted to see the "modern GUI panels" as stated in the release notes.
First thing I noticed was (besides the GUI drag-icon inconsistentcy between panels like, vibrance and levels), that "0" is not selectable when using the vibrance panel.
When you slide from left to right - and vice versa - zero is not an option; it's skipped.
Other panels, like levels, do support 0 as a valid value (as does the keyboard), but when using the mouse to quickly slide to a + or - integer, 0 is simply skipped.
I checked in Photoshop 26.x.x and there "0" was an option in the exact same panel.
See screenrecording, where I try to set the value to 0 by mouse. It's only possible by keyboard (arrow up and down).