Hey again @Joachim ,
Thanks for those updates
I wasn't able to replicate this under Windows 10 Pro 1909, either with Bitwig Studio v3.1.2 or latest v3.1.3.
I couldn't get Node to crash inside Bitiwig when switching/loading factory presets and then activate/deactivate "Frames", no crash here if I stick to these actions --> Presets Change & Enabling/disabling new "Frames". Tested with both VST 2 & VST 3 without issue.
So here is the question, when you mention "adjusted some of the frames", does that mean that you're also trying to create/modify "Nodes" ( the dots on the waveform itself ) ? Which is something different than just enabling/disabling "frames" ( the squares boxes slots ).
I do have Node crashing inside Bitwig 2.1.2 & 2.1.3 when loading/changing factory preset --> then revert to Init preset --> and trying to add a new "Node" --> crash.
I've also seen some errors in Bitwig Engine.log file ( found in C:/User/Username/AppData/Local/Bitiwg Studio ) each time I load/switch preset using the VST 3 plugin, as well as some information when the previous described crash happen. I will send this to S.A team as well, but back to this one, couldn't get a crash just playing around with the frames, so need to know if you tried to create new "nodes" at the same time, then it could be related or similar to this issue reported with the standalone version here : https://forums.sonicacademy.com/t/node-beta-standalone-crash/34981