I too believe this issue may be a MalwareBytes. I have another computer without MalwareBytes installed and have not had this issue on that device; it is currently at version 18.151.0729.0006 which is in the Production Ring.
I know MalwareBytes has been suggested previously and I think a user stated that MalwareBytes had committed to a fix, but I don't believe this has happened.
Does anyone have an ongoing ticket with MalwarBytes that may wish to comment?