I want to say that the problem is not only in the smaller FPS. There are a lot of microfreezes, which sometimes make it impossible to play.
I noticed that if the "Mipmap levels" setting is set to "OFF" microfreezes almost disappear, but this does not help with FPS. I hope this will help someone.
1.17-pre3 also still has the bug
Amazing gaming experience since 1.17!😛
I think the problem will not be solved until the release, because there is only a week left. Method with exiting full screen is working. Before was 40-50fps, after - 65.