Today was the first day I have noticed this happen. I got a notification from a Pushover driver device and I got at least 10 repeat notifications in a row. Has this ever happened to anyone else?
Definitely strange. Can you see what the device is attached to then run the actions of that rule to see if you can repeat it? (no pun intended)
My Pushover driver started going crazy since yesterday. I am now getting 3-4 false notifications per MINUTE that a door is open. I deleted and created a new Pushover API, and I also deleted the rule that was using the Pushover driver to send me notifications, even though according to the Pushover driver logs no notifications were being sent by Hubitat to Pushover, but I continue to get non-stop notifications out of the blue. Did you ever fix your issue? Thanks.