Trying to identify source of interruptions - Harmony 15

We recently upgraded from Harmony 14 to 15, and got some new machines to go with it (graphics: NVidia Quadro M4000 - RAM: 32GB)

I’m running into a problem where Harmony will freeze up every 3 or 4 minutes, for about 30 seconds, regardless of what I’m doing (even if not doing anything at all), and regardless of whether it’s a heavy file or not.

All of my drivers are updated, and I don’t run into this problem when using other software (Photoshop etc…)

Any idea what could be causing this?

Thank you