Nest inside Multicam - hotkeys don't work

Another bug addition to the set of multicam bugs in Premiere Pro 26.5.3 found here and here.

Hotkeys refuse to work when you find yourself inside a nest which is inside a multicam sequence. I first noticed that when Ctrl+Z didn't cancel my previous action there. I went to keyboard shortcuts section and reset my custom shortcuts to the default Premiere Pro ones. It didn't help, but I forgot to check it. Today again the same shortcut doesn't work inside the nest. I reset the shortcuts and it gave no effect. The same is with my custom S for Add edit and the rest both default and changed.

Steps to reproduce:

- create a multicam from 2 clips

- create a nest out of 2 clips used in the multicam, pan them left and right and use crop (any) to make a splitscreen

- put the nest into the multicam

- go inside the multicam, then inside the nest. Check if the keyborad shortcuts work.