Have you tried to factory reset your router? As I said nest hub changed
system 3 days ago, so we can expect bugs. I have much bougs because of
that system change. Google should repair all bugs till the end of the
month, just wait for end of month. If...
It may depend on your internet connection speed, also nest hub 2nd
generation changed system, and there's much bugs for now. Maybe try
factory reset your nest hub.
