Motion sensor scene anomaly

I have the PIR000 Motion Detector set up in the laundry room.
Scene: event type = an armed sensor is tripped
Commands: Laundry lights = ON – after 15 min – OFF
I enter the laundry room, and the light turns ON. I exit after 5 minutes and I manually turn the lights OFF. I reenter the laundry room 9 minutes later, and the lights turn ON again. And just one minute later the lights go OFF. Apparently the scene from my first entry to the laundry room has executed the 15 minute delay, and turned the lights OFF.
In my opinion if a new event is executed while the previous instance of the same event is still running, Vera should cancel the previous one. Or is there another way to adjust this?

Known issue, may be fixed by Luup…