SHG PZT volts was close to railed at 100V with temperature drifts, see attached. We do have a checker for this when the IFO isn't in NLN 71595 but this drift was quick.  It automatically relocks at a better PZT value (56V, middle of range). It unlocked at 22:33UTC and we were back in observing at 22:46.

SHG was v. quick to relock but the FC was slow, not really finding IR ad failing at TRANSITION_TO_IR. it took ~7 attempts to lock. I paused SQZ_FC in DOWN after 4 failed lock attempts an touch FC2 as in 73797 but the green FC trans was already good. After 3 more attempts it locked itself.