Unrestricted battery usage

Ask Android to leave JustCoffee running in the background.

Android pauses apps in the background to save battery, and can pause the VPN with them.

Unrestricted battery usage, under Settings, Automation, asks Android to leave JustCoffee VPN running. Turning it on opens Android's own prompt.

Android only allows it to be revoked from its own settings, so turning it off takes you there.

Still stuck?

Most answers are a search away. If not, a person is. The barista answers in seconds and hands you to a human when you ask.