Rekordbox 6.8.3 jittery waveforms after update on Macbook

Just wondering whether anyone else is finding that the waveforms are stuttering a little after the most recent update to 6.8.3?
I was running 6.8.0 with no problems and then installed latest update to find this happening.  I've then rolled back and installed the earlier version to find it still happening.
It's not a deal breaker, just annoying and wondered whether it is just me.

Let me know if you're having similar issues.

Cheers
Ian