There's a very long thread with over 100 replies on this issue; it's not happening to all customers, and Google Nest acknowledges it as a problem:
I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have.
Thanks for the help here, Rubes, MplsCustomer and Brad.
Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.