I have been running 7.12 firmware on my profilux4 for some time now.
Earlier it lost wifi connection on regular basis and required reboot.
But firmware 7.12 seems to have fixed the problem, no wifi loss ever.

Even when router lost power for 1-2 hours there was no problem, P4 was on ups and powered.
As soon router was back online, P4 reestablished connection without reboot.