Aeotec wallmote quad, launch 2 scenes instead of one

Hello,
I’ve an aetoc wallmote quad that I use, for the moment, to control the on and off of the water jet of a pool and the other one controls 3 groups of lights to do on and off. I’ve created 4 scenes, one to activate the water jet, one to stop it, one to activate the group of light and one to stop it. I’ve assigned the first one to “tap button 1”, the second one to “hold button 1” , the third one to “tap button 2” and the last one to “hold button 2”. Everything works well when I tap button 1, the water jet start, but when I hold button 1 to stop it, it stops the water jet and something like 2 seconds late it starts the group of lights. If I assign the same scene to “tap button 3”, that is not happening. In the log I see clearly that the controller is starting the scene that starts the group of lights. Do you have any idea of what can cause that ?