You guys are just AWESOME!!!
Thanks a lot, that GDI thing was the culprit - and I fixed it!
I opened the project- Nuendo used about 8.000 GDI objects… now insert Halion… dang… 10.000! And those GUI issues…
I modified in the registry - to somewhat about 20.000 - wow - now it works!!
I had similar issues in the past from time to time - having those GUI issues in bigger sessions… till I closed plugins and re-opened the mixer etc… maybe this was caused by the GDI thing as well.
I NEVER heard about that before… Sorry for blaming Steinberg for that. But for days I was struggeling with stuff which slowed down my workflow and killed my vibe and creativity… It was just too much issues.