I'd like to add that I have been observing the same exact issue since upgrading to 4.0.
Makergear M2 Rev E.
Watching Task Manager, the CPU usage for S3D process drops to ZERO for the duration of the micro-pause.
No other processes rise up to higher CPU usage during the micro-pause.
Very frustrating because blobs have to be edited out with an X-Acto.
Anyone see a resolution for this?