The interferometer has been systematically unlocking in LOCKING_DARM_IR this morning, with ~10 failed attempts. I have changed the lock acquisition request to LOCKED ARMS BEAT DRMI 3F.
Indeed, the ITF unlocked at 7.40.55UTC because of another glitch of the NI_F0_ACC (see fig. 1).
After that, the MAR controls of SDB1 opened (and so they are yet), see fig. 2.
Maybe, it is better to leave the ITF in Locked_arms.
After open/closing the SDB1 angular could work again. But then in DRMI 3F the correction diverged, and the loop didn't want to close anymore. After some time I have realized that the floating set point have saved a very misaligned position. Reverting to fixed set point the lock acquisition went to LN3 ALIGNED on the first attempt. I have restored floating set point for SDB1 so that they learn again the correctly aligned position for SDB1.