Vesrion 23.5.1 - after some time, PS being open, when selecting with the polygonal lasso, PS develops a bug - it stops responding to Backspace and Escape keys. When mistakenly placing a polygon point, it cannot be deleted with Backspace, also Esc doesn't cancel the selection.
To recover from the locked state I have to Alt-Tab to another application.
To stop this behavior, PS must be restarted.