I have seen some people in the past struggling with their connections being revoked with absolutely no notice to them (this usually happens with Google).
I was having a similar issue today and decided to build a scenario using the Make API that will periodically monitor the state of the connection I was having issues with and let me know if it’s still active via Slack message. I think this will be useful so you can have some sort of monitoring system in place for important scenarios and you can even use it to do stuff like pause scenarios to avoid execution errors.