In 12.12 build 13120
There's an inconsistency in handling "enter" as the start-playback shortcut, at first I thought it didn't work at all, but found it ONLY responds to "numberpad-enter" not "main-keyboard-enter".
I checked "insert" for stop: Both "inserts" work (main-insert and keypad-0-insert) so for consistency, I think both Enters should work too?
I tend not to use the keypad, so kinda forgot there was even an Enter there! Duh.