Apple Watch doesn't vibrate in the morning (sleep schedule)

Hello community,

for some time I got a problem with my wake up alarm with my phone/watch.

I have my sleep schedule set on my phone in the health app including the alarm.

At the bottom it says "when you wear your Apple Watch to bed, the alarm will go off on your watch". With my watch on silent mode, it used to do exactly what I wanted: It vibrated in the morning waking me up without waking my wife. And I think it switched to my phone as an audible alarm, if I ignored it :D

Now eventhough I wear my watch, it doesn't vibrate at all and my phone immidiatly goes off with an audible alarm.

When my schadule is active it shows the information on my watch. So it shows that I am in sleep mode and when my alarm is set. SO the communication between the phone and watch works.

I tried finding solutions online like restarting, unpairing & repairing, resetting the schedule etc.

Nothing fixed it for me. So now you are my last solution :)