My lock Version 1 does this from time to time, and after it, it tries to calibrate itself, with very strange behaviour, it locks two times until it goes not further anymore, and gives then again a error out, that it is blocked, - but it’s normal that after locking two times (720°) that it cant go further, and should actually turn back then two times for calibrating the unlocking, what should end in a normal successful calibration, but no, I have to start a new calibration manually, for get it to work again!? I noticed, when starting a calibration manually, the lock always calibrates the unlocking first, and the locking second, but when the issue appeared and it tries to calibrate itself, it does the locking first, what ends in a error again!?