Unable to use "Page down" or "Page up" keys in comments list, Acrobat Pro DC, Mac

[Shlomit Heymann]

Hello, 

The keybaord keys "Page down" or "Page up" will not work in comment list.

While one comment is selected, I used to be able to hit these keyboard keys to scroll the comments up or down. Now, when hitting these keys, nothing happens. They do work when I'm on the pages itself, but not when I'm on the comments list.

Continuous Release Version 2018.011.20010,
Mac OS X 10.14.6

Thank you,
Shlomit