Can't set "A" as the keyboard shortcut in Viewer mode

[dandv]

Another regression in 0.88 (this worked fine in a previous version): I can't set the key "A" to be the shortcut for "Good (move to next photo)" in Viewer mode. It does work in Browser mode, but in viewer mode, when I press "A", nothing happens.

There was no warning about any conflict when I set that shortcut key. I was able to set other keys, e.g. "Q" or "G", as custom shortcuts for that function.

I want "QAZXC" as the shortcuts for Excellent/Good/Average/Fair/Poor, and "A" can't be assigned. What's up with that?

[xnview]

Known issue