I know that for a while I could not use my glasses at all because every time I launched the EchoVision app on my iPhone it would show me a blank screen that I could not get out of except to terminate the app in the app switcher. Finally I got it to display normally after numerous attempts and at that time I switched my glasses from my home WiFi to my mobile hotspot so I wouldn't have to the next time I wanted to take my glasses with me when I went out because now even if the app shows me a blank screen again, I'm already on the mobile hotspot. I had intended to just leave it this way but yesterday I discovered that doing that drained my battery to the point I had to plug my phone in or have it turn itself off. So now my glasses are back on my home WiFi.
For the past week the EchoVision app has behaved itself and no blank screens ever showed up again, knock on wood.
I do now keep my glasses paired with my phone but they are disconnected so my phone's audio comes through the phone. I think, but don't know for sure if that is why my app is now working and not giving me any more blank screens or if an update to the app has fixed that problem. I have apps set up to update automatically. Even so, an updated app should say that it was recently updated and as far as I know the EchoVision app hasn't been updated since I got my glasses.
I am hoping that with the EchoVision app now behaving, the next time I go out, switching to my mobile hotspot won't be such a problem any more. It would still be nice if the glasses would switch automatically but that seems to be a hit or miss proposition. Some people get lucky and some don't. And I seem to be on the unlucky side of things there.
Maybe these glasses jut need time to settle into their new home.