Under preferred activities in the Google Home app, see if you have video
conferencing checked. If you do, uncheck and restart. I used to have
similar issues and once I unchecked that box, I rarely had dropouts, if
any at all.
Same issue as well. The Nest Camera (Battery) is plugged in and charging
all day and then when taken off placed back in location, within a day
it's dead. I'm at a loss as to what to do with it