since build 840 public and up to current public beta build 858 I cannot use a few keyboard shortcuts (honestly I didn't try all of them

So far I found this:
Ctrl+PgUp Go up
My temporary solution was to assign a different key as "secondary". But I'm wondering if it's my problem (like something related to m keyboard layout) or a bug.
Using Win10 Enterprise 21H1 x64 on Acer Aspire 5 - AMD
Thanks