I'm also experiencing this with home-assistant. Removing and re-adding the container seemed to work but a few days later it regressed to telling me auto update updated it but still saying "update ready". I've also had a few situations where the docker just disappears from the UI and is inaccessible, seemingly randomly and not just when it purports to do an update. Very annoying with a home automation server that suddenly is no longer there to turn the lights on/off like you were expecting! I've found no solution that sticks so for now have removed it from auto-updating to see if that helps at least the docker staying up and running.
