Anyone? No one has ever had issues with not seeing devices in ROMON?
Researching further, it seems to be related to this thread
http://forum.mikrotik.com/t/romon-packets-not-passed-by-edgeswitch-24/90191/1
And this thread in the ub forums
https://community.ubnt.com/t5/EdgeSwitch/ES-24-250W-and-Mikrotik-RoMON-failure/td-p/1313979
“This is known issue caused by UBNT. They block frames with unusual ethernet frame type, which are being used by ROMON.”
https://community.ubnt.com/t5/UniFi-Feature-Requests/Passing-RoMON-packets/idi-p/1976558
Be forewarned, ubiquiti switches and ROMON does not seem to work together.