An issue I've been dealing with forever on my mbp 2013 is the machine just pausing input for 2-4 secs (video and audio don't hitch, just keyboard/mouse input).

I recently took the trouble to completely wipe the disk and reinstall macos mojave and it's still happening so it's not due to cruft installed over time in OSX. I dunno. I'll deal with it until it gives up the ghost and probably move to a windows machine with the work they're putting into WSL2