My wife has the current iOS production app. Off the top of my head I don’t remember the version number. But camera groups and solo cameras on her phone are rock solid. Under a second of delay before live view kicks in.
Our phones are identical iPhone X’s running the same version of iOS. So in all respects other than the app version they are the same. This is definitely an issue with the beta app. Might also be an issue with Android from what you are saying. I also have an iPhone 11 running the current iOS beta and the production App with no issues. I put the beta Wyze app on and immediately saw delays and frozen cameras and connectivity failures.
Got tired of running beta iOS on my daily driver so finally bought a new phone to run it on.