2.8.0 has fixed for me. Recalibrated too to be on safe side.

Same issue here, all 3 valves making grinding sound when closing. Pretty poor that a firmware update is pushed that could be damaging people's valves. Surely someone must have tested it on a real...

@Little_C Think they've updated the app since those instructions were written - there's no "Other" option any more

Are there any plans to update the SmartThings integration to support the KE100 smart radiator valve? Thanks Paul