Exec with Number Items

can I use the Exec binding with Number items?

I would like to execute a bash file every time the number item changes.
With my current configuration, the file is NEVER executed. Using the same configuration with Switch item on the other hand works.

Here’s the item:
Number Inflow “Istwert Volumenstrom Zuluft [%d m³/h]” {modbus=“ventilationHouse:11”, exec=“CHANGED:/opt/openhab/edomi.sh 40 %2$f”, girahomeserver=“103/3/28”}

Does Inflow get changed using sendCommand? You can find out by watching events.log. If it gets populated using postUpdate, which is typical for Number Items, there will never be an event to kick off the Exec binding.