Hi, thank you very much for investigating. I have tried the conditions I mentioned earlier, however now it is working correctly.
I swear I could reproduce it every time - so much that I refrained from opening the app when away from home.
Perhaps some reboots of the WiFi AP and my phone have fixed my issues. Or I was doing a difference process that was causing the error.
I will continue to test and see if I can reproduce the error consistently, but perhaps it was an issue with my devices/setup.
I will report back if the error returns, thanks for your help.