That looks like Stage Traxx 3 right?
If so, that is not an uncommon problem (I used to run into it constantly once I had more than 2 clients). You can do a lot of messing about to reduce/minimise it or wait until you decide to move to Stage Traxx 4 (in beta now) where you won't run into that issue as the Network Sessions network protocol has been completely re-written and is now incredibly reliable.
With ST3, the main thing that can impact are the WiFi/Router and the number of devices are connecting to it. How many devices vs. capability of router. Small travel routers can more more susceptible if the number of devices increases.
I had 5 clients connecting to a Host and with ST3 I could reduce the number of errors, but never eliminate the errors. If each device got 1 disconnect per night, that was a good night. That was even after I had replaced our neat little travel router with a full blown home WiFi router.
