I got unstable FPS when I used a KinematicBody2D and ran the game in-editor. This bug has tens of reports over 2 years, and needless to say, renders the engine

I got unstable FPS when I used a KinematicBody2D and ran the game in-editor. This bug has tens of reports over 2 years, and needless to say, renders the engine impossible to work with. To be fair, it got fixed in master a month ago, but there's no reason to believe that this would be a one-off. In my opinion, the project is trying too hard to add fancy features instead of stabilizing and bugfixing core features. Not a fan of the contribution model as well, in which they basically accept all PRs and then fix the bugs later. They claim that it's faster than using regression tests or using a more thorough reviewing process.