Silence - No Vibrations for Notifications on Epix 2 - General Use

Dear Epix community

I am experiencing a problem where my Epix 2 watch is not vibrating:

I turned on the notifications for calls/apps/text messages for General Use and During activities to „Vibration“. Further, in the System menu, vibration and button vibration is turned on as well.

During activities - it works perfectly well - it vibrates as it should.

As soon as the activity is over - notifications from apps and calls still appear on the watch, however, there is NO vibration at all anymore. Solely silent appearance.

Settings are correct to me. I am on v8.37 (but also 8.21 did not work). 

Does anyone experience the same issue or has a solution to fix? 

Thanks so much.

a.