Fibaro Binary Sensor - Inputs abnormal Double Action behaviour

I have two Fibaro Binary Sensors connected to Homey, both with Normally Open Inputs connected one to the alarm system and one to the bell push button.
Both have the abnormal behaviour of sending double information once closed. I do not only have the flows (using WHEN “Input 1” Closed) fired twice but also double push notifications.
Is there anybody having same wrong behaviour?
Any suggestion?
I tried making (WHEN “Input 1” Switched) AND (“Input 1” is Open) … Same problem.

Your problem is possibly bouncing of the contact, you can fix this in the flow that is handling the input:
in the THEN part, disable the flow that you’r in and enable the same flow after 1 or 2 seconds.

Thank you for suggestion I’ll give a try!