Galaxy Watch 4 not vibrating in Do not Disturb or Bedtime Mode

Hey guys,
I would like to use the vibration of my Samsung galaxy watch 4 as alarm but also have my phone in Bedtime mode (do not disturb) during the night, but when this mode is set the alarm is shown as Symbol in the watch but it does not vibrate. I gave the app all permissions.
Is there a way to get this to work?
Thanks, Frido