Hello Frederic,
To be able to track errors, I’d like you to first add timeline notifications / Simple Log app THEN & ELSE cards to your flows.
(I add SimpleLog cards to each and every flow, while the timeline is unreliable (can get rate limited), and lacks a sort & search function)
This way, you can discover:
- No notification / no log entry: trigger didn’t work
- Notification present / log entry present: trigger & flow worked, but the device(s) didn’t respond.
Flows which only sometimes work / not work is AFAIK not Homey’s fault.