After the maintenance the FSS was found to be unlocked and the auto locker had a hard time relocking.

We knew that the fringe was supposed to be at around 0.37 to 0.38 K but the scan setting was [0.2,0.4] K, and it seemed like the auto locker finds something scanning up at around 0.37, but gives up after some failed attempts and starts to go down without scanning up further.

I changed the scan setting from [0.2,0.4] K to [0.32,0.42] K so the scan is slower and the right temperature is at around the center of the scan range. Also I temporarily lowered the resonant threshold from 1 to 0.2.