Hallo Martin
thank you and sorry for my late response. Vertex Group is correct.
I have my Blend File in Protonmail-Drive https://drive.proton.me/urls/DXXJZEZD88#9EdoCn6WTAQF
Thank you for your help. I started over again btw with a new file and it happened again…. very strange, couldn’t figure out what the cause for this is.