5.3.2 FPS problem

Since updating to 5.3.2 the FPS periodically goes from about 60 to nothing, which as far as I can tell also is the cause of moving objects stuttering. This happens on all my old projects and any new ones I create. Does anyone know what is the cause of this?

I’m attaching a screenshot of a completely empty project:

I’m experiencing a very similar issue lately. Did you find an answer to this problem?
Any new project I create, no matter how simple scene I view, the same stuttering is present.
I have target framerate set to -1 and Vsync is set to don’t sync.

This is what I see in the profiler:

Any ideas what might be causing the visual stuttering? It’s like having 15-ish fps, even though all fps counters say its way above that.