Mobile devices are very aggressive with their power saving which unfortunately means that we can easily lose the TCP connection we have with the ThinLinc server. This can happen for something as trivial as leaving the device idle for 30 seconds and letting the screen turn off.
Since this is so very common on mobile devices we probably need to do something about it. Probably some kind of reconnect logic.
(it also easily happens when you click the URI bar on Firefox as it tends to trigger a reload when you exit it)
Firefox has gotten slightly less aggressive about this it seems. Haven't investigated exactly where the limits are.