Here's what I experience:

1. internet just works,

2. I enter a meeting,

3. the meeting is going smoothly, hence internet must be working, no?

4. during the meeting, I try to open some other web page (on different browsers)

5. I get a ERR_NAME_NOT_RESOLVED instead,

6. I close the meeting,

7. I still get ERR_NAME_NOT_RESOLVED if I try opening a page.

Last time (a few minutes ago while I was in a meeting on https://meet.google.com/), and most likely also the time before (a couple of days ago while I was in a meeting on https://meet.jit.si/), I've recovered internet by

$ connmanctl
connmanctl> disconnect ethernet_e0d55e2dee05_cable
connmanctl> connect ethernet_e0d55e2dee05_cable

And it has happened before, even though I don't have a huge record/recollection, because I haven't used the system I'm referring to for quite some time (at least not for videocalls) before coming back to it just a few weeks ago.

Furthermore, I don't know if the "breakage" happens right after I join the call, or it takes some time.

Incidentally, I haven't taken any action yet as regards my earlier question Guidance in migrating from Connman to iwd+impala for ethernet+wifi.