uTrack-X32 recording suddenly stops!

Ok, after some more testing it’s definitely a network related problem. While uTrack is connected to the router (even if it’s the only device connected) the problem is present; if uTrack has no LAN cable connected, it records flawlessly (at least for 12hrs, as far as i tested).
Now I’m trying using another router, and it’s been recording fine for almost 2hrs, let’s see how far it goes…

The main router i’m using (which causes interruption) is a TP-Link TL-WR841N, the one I’m testing now is a TP-Link TL-WR802N.