It's the 100 percent the app. It's the same on my phone. If I uninstall
and reinstall the app it works. Then a out 4 hours later the app comes
up with a 'running in the background' notification then as soon as that
happens it dies. Been like I since ...
They honestly don't seem to accept that there is an issue. It blows my
mind that so many people are flagging this up and all they say is reset
the product and check your settings...
The only fix that has ' temporarily' worked for me is signing out the
app then signing back in ( nest app) works for a few hours then goes
back to not working.. definitely an app issue