Zlink dropouts, mute calls and google assistant

[Harpy]

Hey folks,

I have a couple of issues that I would like some feedback on:

Zlink drops out - When I am driving, Zlink will randomly drop out and then reconnect. Any fixes?

Mute Calls - Can I mute calls so that people at the other end don't hear me or the background noise?

Google Assistant - When running Zlink and saying "Hey Google", the unit switches from Zlink to the Android operating system. Any settings to fix this?

Thanks in advance.