I’m using the UR242 on a Mac running High Sierra 10.13.6. When I use the main outs within a few minutes the audio starts to glitch out and eventually drops out entirely. I’ve reinstalled the drivers, installed the newest firmware, changed the buffer amount in Ableton. Same issue always reappears. If I unplug the line outs they will sound fine for a second and then eventually go bad again. Whats infuriating is that the headphone outs sound fine the whole time. Nothing I do in the Sound/Midi Utility seems to make a difference. Is there something I’m missing?