Epmp180/200 does not work perfectly with ubnt devices in PTMP mode in Standard wifi mode

epmp 180/200 done point multi point with two products in standard wifi mode with ubnt device, link perfect but after a while no bandwidth transmits link stays connected and can’t access station devices problem solved after reboot. but after some time same problem shows again

What firmware version on the epmp radios?
What your description of the issue points to is a known issue with 4.7.0 and

Try using beta 4.7.1-rc13 or dropping back to 4.6.1
Both of these versions are very stable.