In 3+ years I’ve never experienced a flow itself fails for unknown reasons
It’s always:
- me: I did something stupid, like deleting a variable which still was used in a flow
- a variable which got an invalid value somehow
- app crash / paused app: this causes all related flowcards to become unavailable. The flow breaks, and stops functioning, but,
This wonderful app monitors all those variables, breaks, errors and mistakes and notifies you: Flow Checker
Advice: add Simple Log app log cards to each and every part of your flows, to be able to search historical data.
It even has a script to add log cards to all flows.