Arc / mini sub / L&R Era100’s
Only the RH ERA100 signal was breaking up and stopping every 20 seconds or so for 1 or 2 seconds at a time off/on/off etc.
WIFI signal? Nope. switched channels. Switched access points. Strong signal.
Too close to a wifi enabled coffee machine? Moved - Nope.
Answer? Mixed wired / wifi across system
Arc was ethernet, sub was ethernet.
Switched all to WIFI - FIXED.
♂️