This afternoon just after the daily meeting (14:18:15 UTC, ramp = 5 s) I enabled BS_TX in full bandwidth.
Profiting of no detector Observing, I also re-instated it in the lock acquisition, line 6183 of ITF_LOCK.py. In case again of unlocks in ACQUIRE_LOW_NOISE_3, that line should be commented back and the node reloaded.