If there is, I don’t know what it would be. Reading your posts, I get the impression that you’ve done all the right troubleshooting so far. The only other thing I would add would be ensuring that your Cam Pan v3 
is up-to-date with its firmware, but I imagine you’ve already done that.
It seems like most of the users in another topic who are having this issue with Google Home are also iOS users, so at least you’re having some luck with Android. There are some suggestions in that topic about the things you’ve already done and also about playing with router settings or trying a different router entirely. I’ve never used Google Nest APs, so I don’t know if mucking about with that would do you any good or not.
I agree. Although Wyze does have its issues with Google Home/Assistant integrations…
…and that includes the way their own routines call their own services, apparently. 
I also concur with your assessment of the Google Nest Community, unfortunately. My limited experience there has been much less helpful and significantly less engaging than the Wyze Forum.
I wish I had more advice at this point, because I’ve had a generally positive—though occasionally glitchy—experience with my Cam Pan v3s streaming to the Google Home app (Android) as well as a Google TV, and I want you to have that same or better experience.