Netatmo Thermostat and Boiler Pump Issue

Hi everyone, I just installed a Netatmo thermostat on my De Dietrich boiler and I’m encountering an issue with the water pumps. After the installation, both the radiator pump and the hot water tank pump are running simultaneously, which wasn’t the case before. This is causing increased gas consumption as the boiler is heating water that shouldn’t be circulating through the radiators. Does anyone think this could be related to the Netatmo installation, or is it more likely a boiler issue? Any advice would be greatly appreciated. Thanks in advance!