Interesting. A few hours ago I had a nice domestic conversation with my coleague about robot vacuum cleaners. He was talking about iRobot Roomba and I was talking about Xiaomi. Here's the result!

Interesting thing is that we talked in a *voice* conversation. Over Slack. Over Chrome. Over corporate VPN (openconnect).

Where's the spying link? Slack or Chrome?

My bet's on Chrome.

What does that tell you about the privacy of your sensitive conversations? :)
Hide behind VPNs all you like. If you have proprietary software (or hardware in the case of Huawei) - you're being watched and listened to.

EDIT: I'm on Linux, he's on MacOS