Damn! 
I am sorry! I did not mean to lead anyone astray!
Now I am now imagining a lot more variablesā¦
Test OG cam is firmware 1.0.67
SD card is 256GB formatted by camera (Samsung Pro Endurance or SanDisk High Endurance)
CamPlus Unlimited is active
Just tested second iPhone with 2.50.1 (1) and seems OK
One iPhone is iOS 16.7.1 and the other is iOS 17.4.1
All local LAN, phones on WiFi - no cellular or remote location
The iPad that has the freeze issue with 2.50.1 (1) is old and stuck back at iOS 15.8.1
Very troubling that Wyze is not mentioning it on their known issues
I had no idea that you could not flash backwards and forwards on the OGs like the rest of the Wyze cams I have owned - that was an annoying shock.