Audio Glitch every 10 minutes during playback mac OS High Sierra

[sitruc]

This has been driving me crazy for a while now (5 months).

I can't track down why my audio will pause almost exactly every 10 minutes.

Whatever is playing, a simple track with no plugins or an entire mix. The playback "glitches" for just enough to throw everything off and then keeps going. It seems to do with the time that I turn on my machine - as in if I turned it on at 9:37 then the glitch will happen around the "7" everytime (e.g. 47, 57, 07 etc.).

macOS 13.13.6 High Sierra
iMac Mid 2011
2.8 Ghz i7
32 GB memory
Apollo Twin Duo lightning
Reaper 5.978/64

Any ideas? Thanks.