My problem has disappeared also. My solution in the end was to move the
Nest cam to a separate wifi/vlan away from the Nest Hub, Nest mini,
Google Home and Home minis.
Hi! Thank you both for your reponse. Wrote a long answer a few days ago
but the page reloaded and I lost it and did not rewrite it. The problem
has lasted through several reboots of both during months. 2 meters apart
in the ceiling of the same room. ...