Rhino 8 GH1 scripting components hints not showing

I recently moved to Rhino 8 and new python/C# components no longer giving hints for custom class anymore.
Old python:


New python:

what am I doing wrong?
Edit: I’m using R8 SR21

@eirannejad Could you please help?

It also does not work with class object that are created within the script. here is an example
Python not giving hints.gh (4.5 KB)

Anyone?