Why am I getting logged out of third-party apps sporadically?

If you are using a Google Suite account to log in to any third-party apps, you need to go through the Device Policy set up to make it stick.

If you are using a Google Suite account to log in to any third-party apps, you need to go through the Device Policy set up to make it stick. Otherwise, you may be logged out during a reboot. Please follow this article to set up the device policy.