Shelly Binding fire Button1 event multiple times

I use Shelly Binding with my Shelly Button1. But if I make a SHORT_PRESS the trigger event status#button fires multiple times. I want to realize a toggle button, but this is unfortunately not possible. Can someone help me?

Platform information:

Hardware: raspberry PI 4 / 4 GB RAM / SD 32 GB
OS: Raspbian GNU/Linux 10 (buster)
Java Runtime Environment: which java platform is used and what version
openHAB version: 2.5.9-1