I had three Wi-Fi's listed on my OS3, the first being the preferred one. When I switched profiles, it acted as if it were trying to use one of the other WiFi choices. The web browser no longer responded, and using SharkRF.link failed to connect. The OS3 did do the profile change correctly, and the voice announcements confirmed the new profile. It just appeared that the OS3 had tried to use a different WiFi. I had set "save to all profiles" when adding Wi-Fi's.
When I was able to connect the web interface with my "favorite" profile, I deleted the second two Wi-Fi's, and again chose 'save to all profiles". Now I am able to switch profiles with no problem, and the web browser reconnects with no problem.
It appears that the two alternate Wi-Fi's were causing the problem. What happened?
It is working now, but I'm hesitant to re-add a backup WiFi.