I have the exact same issue with v2, and would love a fix!
After working about an hour I start noticing a lag in every action. If I keep working through it slowly becomes completely unusable. This is really not working out, so I have reverted back to v1 until 2.1 hopefully fixes this big bug. (Had to copy and paste a lot between the versions to rebuild my work in a v1 file.)
I tried looking at the ram and cpu usage, but seems fine. nothing out of the ordinary.
I have tried some of the ideas here, when I have some spare time I will give the last ones a go, but it’s hard to test for myself since I need to work for about an hour before noticing if anything is different.. and if not, I would have to again copy and paste work back into a v1 project.. pretty infuriating update so far I would say. Hopefully the money earned here is going into stability improvements.
