"1" and "2" keys in the numeric keypad not working for switching tabs
Enable the advanced keyboard shortcuts in the settings.
Thanks, but I already have that enabled. The issue is in 21 that only works on the alphanumeric number keys above the qwerty keys, not the numeric keypad on the right. On 12.17 you can use either.
Have you filed a bug report?
No, as I didn't really consider it a "bug" as technically the key codes are different.