Monterey 12.1 Mail.app keyboard shortcut for Quote Level Increase/Decrease

I seems to me that Apple has changed the keyboard shortcut in Mail.app for manually changing the Quote Level (with 12.0.1 or 12.1). When I try the key combination shown in the Menu of Mail.app (Format => Quote Level => Increase/Decrease), my iMac-24 (M1) opens 1P, or there is a beep.
This was no problem before, I used to manually change the Quote Level quite often, but with the Shift Key in addition and the Option Key to switch between Increase/Decrease (if I recall correctly ... have attempted now so ofter that I am not sure any more).
I wanted to confirm this on my MBP that is still running 11.6.2 ... but it seems as if the update to 11.6.2 has changed this keyboard shortcut as well? Anyway, when I try to change Mail.app Quote Levels on the MBP now, also with 11.6.2 and 1P 7.9.2 there is interference with the 1P main app.

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1Password Version: 80500046
Extension Version: 2.1.4
OS Version: 12.1