P: Photoshop 26.10 Unable to change the input value of anchor points in curves using Arrow keys

I am a professional photographer who adjusts many photos a day in Photoshop CC.  I am a Creative Cloud subscriber and have the latest version (26.11) installed.  An important part of my workflow involves the Curves adjustment panel.  I open the panel and click on the little white triangle on the bottom right of the curve display to adjust the highlights in the photo.  Clicking that little white triangle makes it so I can adjust the position of that slider, the "Input" value which starts at 255, incrementally by using the up-down arrows on the keyboard.  While adjusting this slider incrementally with the arrow keys, I then click "Show Clipping".  I then bring up the highlights in tiny increments my tapping the down arrow key until the highlights have barely clipped.  Then I do the same for the blacks.

In the most recent update of Photoshop, when I follow this process, and I click the little white triangle, I am able to adjust the input value of the highlights incrementally with the left-right arrow keys, but once I activate "Show Clipping", I cannot adjust the curves slider with arrow keys, only by clicking and dragging the slider.  So I am having to view the clipping, the uncheck "Show Clipping", make a tiny adjustment, the re-check "Show Clipping", then uncheck, then re-check, then un-check, then re-check, and so on until I get it where I want it.  This is massively slowing down my workflow, and I am wondering if this change was intentional, if there is a reason for it, and if there is anything I can do to change it back to the way it was.

I am working on a 2019 MacBook Pro running macOS Sequoia 15.4.1.