I don't have these proximity problems during calls. However it forgets to wake up after the call. Still might be better than your experience, as triple power wakes it regardless.

I've paired it to my car and the calls are not routed. However the media audio is, so maybe just further reconfiguration is needed only and might be fixed soon.

Here is the Discord server, might be more useful for you.

https://discord.gg/zRUntgK