Cubase 9.5 - Cannot load VST plugins in big projects

I guess this might be the problem:

Studio one Official Anwer:

Cubase discussions:

Short: no solution. Even worse, plugins might not be loaded back into the project when a certain limit is reached. In my case I also have problems inserting any more vst instruments, not just insert plugins.

Doesn’t seem a problem on OS X, but switching is no solution either

cheers, lokotus