You cannot set hotkeys for the other selected elements (dropdown) in the new client. Here as an example, I cannot choose any keys for mute/unmute on the microphone. It only works for toggle.
Both: newly created profiles and imported profiles are not displayed or can be set. However, it should be mentioned that the hotkeys still work when importing, even if you don’t see them in the settings.
I haven’t found anything about this in the forum yet, and I can’t say how long it’s been going on, as I’ve only used the toggle function in the past.
EDIT: When I click “choose”, it generates broken event entries in TS3.