I suppose I have the same problem. I am using the (enthousiast) yellow GS-911 for my R1200ST's (K28) and have used it to service a 2014 K1300s (K40). Since this summer I also own a 2018 F700GS (K70), so I bought the lead connector to connect my GS-911 to the OBD-II on this bike. The GS-911 cannot read the ECU and 'asks' to turn on the bike's contact, whitch is -of course- already on....
Guess I have to upgrade for a new GS-911 to solve this problem?