If you are seeing the cpu creeping up issue, do you have homekit_controller enabled? It looks like there may be another code path that does not use the shared zeroconf instance that needs to be converted.
We thought we got them all in https://github.com/home-assistant/core/pull/37691 but it appears something still needs to be found.
It may be the same issue here Python3 high CPU Usage
I’m collecting details in https://github.com/home-assistant/core/issues/38668