Frontend.set_theme service does not change theme

So I can’t seem to set a theme from the call service page using:
Service:
frontend.set_theme
Service Data:
{“name”: “darkred”}
The darkred theme is selectable manually under the profile page and it works so I’m not sure exactly why the service call doesn’t. Does it maybe have to do with the new profile system or am I just doing it wrong. Of course my automations do not work that call this service to. I cant see errors in the log. Can somebody throw me a bone

+1, Confirmed.
I assume you are right with the ‘new profile system’.