The recent update to the KE 100's has caused the same issue from a previous update I posted about. The units are making a grinding noise or similar on closing (even after calibration). 

Also, at least one unit no longer opens the valve at the correct temperature so I have to set it many degrees higher to get the radiator to heat up.

All my KE100's are paired to Tapo T315's so should be accurate. I've also tried recalibration multiple times to no avail.

These issues only started after updating to the latest software when prompted in the app recently.