[MKnueven]

I have the same issue. Although my situation is a bit different. I am simply using a network router (just plug it in, no need to purchase/pay for a hotspot plan unless you need Internet at your gigs). It would be great if I could just power up the tablets and they connect with the previous settings, but they rarely do. During gig, I keep my tablets on with no sleep, so once connected, they generally stay connected. All tablets are the same - Android, Kernel 3.18.22 (probably cannot upgrade). i played around with this several times to see if it's the server or client and really can't tell. I simply go into the Manage Device Connections and press New Master and for the clients select the group and connect. Simple button presses, but I would think the Reconnect devices at startup could handle.

You mentioned a different IP (which I assumed would not make a difference). I suppose I could create a fixed IP address for each tablet in the router settings - which might help. I agree this can be difficult to narrow down. If I could provide some logging info (maybe in the next release) I can dump the logcat to help narrow things down (I have Android studio to look at logcats)? Just an idea, which may not solve all of the above issues.

Mike