Stelpro Ki Heating thermostat cannot set heating point

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I cannot set the heating point from the mqtt bridge. I can get the current state, temp, current setpoint but i cannot set a heating point.

Here's my Mqtt bridge log

info: Subscribing to smartthings/Stelpro Ki Thermostat/coolingSetpoint/cmd, smartthings/Stelpro Ki Thermostat/coolingSetpoint/set_state, smartthings/Stelpro Ki Thermostat/heatingSetpoint/cmd, smartthings/Stelpro Ki Thermostat/heatingSetpoint/set_state, smartthings/Stelpro Ki Thermostat/heatingSetpoint/cmd, smartthings/Stelpro Ki Thermostat/heatingSetpoint/set_state, smartthings/Stelpro Ki Thermostat/temperature/cmd, smartthings/Stelpro Ki Thermostat/temperature/set_state, smartthings/Stelpro Ki Thermostat/temperature/cmd, smartthings/Stelpro Ki Thermostat/temperature/set_state, smartthings/Stelpro Ki Thermostat/thermostatFanMode/cmd, smartthings/Stelpro Ki Thermostat/thermostatFanMode/set_state, smartthings/Stelpro Ki Thermostat/thermostatMode/cmd, smartthings/Stelpro Ki Thermostat/thermostatMode/set_state, smartthings/Stelpro Ki Thermostat/thermostatMode/cmd, smartthings/Stelpro Ki Thermostat/thermostatMode/set_state, smartthings/Stelpro Ki Thermostat/thermostatOperatingState/cmd, smartthings/Stelpro Ki Thermostat/thermostatOperatingState/set_state, smartthings/Stelpro Ki Thermostat/thermostatOperatingState/cmd, smartthings/Stelpro Ki Thermostat/thermostatOperatingState/set_state, smartthings/Stelpro Ki Thermostat/thermostatSetpoint/cmd, smartthings/Stelpro Ki Thermostat/thermostatSetpoint/set_state

And what i've tried so far

mosquitto_pub -t 'smartthings/Stelpro Ki Thermostat/heatingSetpoint/cmd' -m '17'
mosquitto_pub -t 'smartthings/Stelpro Ki Thermostat/heatingSetpoint/cmd' -m '17.0'
mosquitto_pub -t 'smartthings/Stelpro Ki Thermostat/temperature/cmd' -m '17.0'
mosquitto_pub -t 'smartthings/Stelpro Ki Thermostat/temperature/cmd' -m '17'
mosquitto_pub -t 'smartthings/Stelpro Ki Thermostat/thermostatSetpoint/cmd' -m '17'
mosquitto_pub -t 'smartthings/Stelpro Ki Thermostat/thermostatSetpoint/cmd' -m '17.0'

It's working for all my other device registered into the brigde.. Anyone having an idea ?