P: Every time I press an arrow key, an entry is added to the History panel,

In version 15.01 and earlier, the mask overlay would disappear when I clicked in a number field for an adjustment to highlight it.
I would then use the arrow keys to change the value, and the adjustment would not commit until I pressed Enter.
The adjustment increments would be the same each time I pressed an arrow key.

In version 15.1 the mask overlay does not disappear when clicking in a number field, but disappears when I start using the arrow keys.
Every time I press an arrow key, an entry is added to the History panel, which rapidly fills up with unnecessary entries.
The adjustment increments are not equal – if I for instance want to use negative Exposure, I get this sequence: -0.10  -0.21  -0.31  -0.42  -0.52  -0.62  -0.73  -0.84  -0.94
I get similar results with other adjustments using Shift + arrow keys.
This also happens with positive adjustments, but only after I reach a value of 70.

I'm seeing this on two computers running Windows 11.