Advice in this thread still holds
Are you using the resistive element mode in the heater because you need the faster temperature rise? Or a winter location where you don’t want it sucking heat from your house? Ideally you’d deactivate the element and just run in heat pump mode anyway. i.e. no old and new conflation.
I suspect Sense will struggle with reliably tracking the heat pump so if you have a Flex DCM it’s a good application.