Thermostat setpoint set issue

We are trying to develop a Z-Wave thermostat centered around the silicon labs Z700 MCU.
The inclusion and exclusion are functioning properly.

When trying to change the device setpoint over the gateway however, the gateway only seems to send "Thermostat Setpoint Get " and never „Thermostat setpoint set“. The gateway also does not seem to be responding to „thermostat setpoint report“ frames sent from the Z700 device.
This does not appear to be the case with hornbach smart home gateway.

This was confirmed with debug points in the Z700 firmware that is being developed.

Could anyone please shed some light on this issue?