What i do:
Version affected : 20 & 21 can't test 22 because i didn't have an developer version and no active subscription.
this is all pretty standard stuff if I am not overlooking something. You also want to show us what you got so far. While short is good, your posting is a bit too short, at least for my taste ;).
Hi @pyr I don't think there is anything related to the SDK and its a Cinema 4D bug so I invite you to post it on https://support.maxon.net/open.php
On the contrary, if you experience this bug only via a script please post your script here so we can help you.