Problem with routine

[dcaccount]

Hello,
I have set up a routine that wars me when the main gate is opening. The routine is triggered by a motion sensor.

I worked regularly until one week ago and then suddenly it has started working only randomly. I checked and the motions sensor that triggers the routine is working regularly.

What could have happened?

Please advise, thanks, Dan

[renegade600]

how are you notified?  what brand and model of motion sensor?  are you using an app, ifttt or what?