Intermittently disappears

This works fine, but every few weeks, the device that I've set up on its app will disappear from the app and give an error when I try to use it, saying something like "Device not found." I have to delete it and re-add it each time, which is a pain because it's a time-consuming process and can only be done if I'm in the vicinity of the device, so if it fails when I'm away and trying to use it remotely, I can't use it.

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