Inconsistent Login to Local Server

I have a new cell phone with the OpenHab Android App through which I access OpenHab (Openhabian running on RPi). When I am outside the house or not connected to my house wifi, I can see the OpenHab non-admin profile and I can login via the admin password. When I am inside the house, on the new cellphone, I can only situationally see the openhab server.

I have two wifi connection points that are both on the same network, behind the same firewall (different network SSIDs) and share an IP address parent (192.168.1. xxx). My new cellphone only loads the OpenHab screens when connected to one of the wifi points but not the other. What’s particularly perplexing is that my laptops can see the Openhab screens when connected to either wifi network.

While not a major problem, it would be nice to fix (or understand)… Does anyone have any thoughts on cause or diagnosis steps that might help isolate the problem?