Hell, such a problem.
XR 18 / MBP Mid 2014 / Mojave / Reaper latest version
From MacBook, playback is given and the voice is processed, which is given back to the mixer via USB Return.
Randomly, at Reaper the graphical interface stops responding, the sound does not stop and does not disappear, after a while everything comes back to normal and repeats itself again ...
What could be the problem, where to dig?
MacBook and XR18 connect via WI-FI
C Reaper tried, the problem remained.
In Logic - everything is ok.
Gif -
https://ibb.co/5Fx71cP