ZBMini L2 momentary

Hello!
I recently got some ZBMini L2 from sonoff. They apparently are default in rocker switch mode. However I want to put them in pulse switch mode. Bt thats where it goes wrong. They never stay in this mode, at most 1/2 times they work like this. Then back to rocker mode, I checked deconz and they are basically never in momentary, I got this issue with 2 switches. The others do work find and go in momentary. I sadly can only read this setting from Conbee, anyone has an dea?