NOtice that by the end of the shift we disabled the FmodErr after every unlock, in case there was a problem on the logic. However, the scan of the RFC would bring the IMC very far from the good working point of the sidebands (~ 1mm). And also on the process the Thermal corrections of the laser would go to 1.3. I reseted them manually and that seemed to fix the problem for a while.

ALso while doing the FmodErr by hand I noticed that the IMC would unlock even for slow/small movements of the z, so maybe that can explain why while scanning the RFC it goes so far, if it unlocks often on the process. To be followed!