R6850 with Unifi AP Pro DHCP very long time 30 min or more to reconnect after power reset

[bspratt22]

Yes this could be a Unifi thing but noticed after the last firmware update to router whenever power to router and/or AP is reset the 5Ghz reconnects fine but the 2.4 (most items about 34) take at least 30 minutes to pull an IP from DHCP on the router. I have not narrowed it down to whether or not if I cut the power to the AP only or the router only if the problem is isolated to one or the other but just wondered if anyone else has experienced issues with DHCP specifically 2.4 network after losing power and reconnecting?

[FURRYe38]

Is the wifi radio running on the router?  

Turn OFF the Unifi AP and see if same thing happens with just the wifi radios on the R series router.