I thought I'd chip in with some recent connection issues I've been having too.
I'm using and ASI Air Plus, 533MC Pro, EAF, running 1.8.3 on Android and up until recently it's been working fine in STA mode. I had to disconnect it from my rig to plug into my PC, but when I reconnected it just would not connect to my phone.
I tried resetting the WiFi multiple times to AF mode to no avail - it either would not be recognised, or fail to connect. It finally connected by chance after 20 mins of trying.
Last night I had a similar issue and wasted about 2 hours trying to sort the same issue.
I've narrowed down the issue to the power port. When the adapter is wiggled in the 12v power input, it either connects or reconnects depending 9n its current state. Even rotating the whole unit (it's mounted by a single screw underneath), this also can connect or disconnect it.
All of my devices stay powered however with no loss of actual power.
I've no clue if this could be a hardware fault or software, based on the above issues. It's been fine up until now, and when it's connected works fine, it's just when it disconnects it's a real pain to fix.
Any advice would be appreciated here!