It is happening pretty consistently during each lock acquision.
It looks like it started around noon today.
Shuttering ALS now causes violent fluctuations at the AS port, and causes the test masses to saturate.
This is apparently because of a rewrite of the LOCKING_ALS state in ISC_LOCK which was not tested.
Both X and Y tidal are requested to go to "transition" (i.e., IMC-F offloading enabled), but Y does not do so. This causes X to offload IMC-F by itself (unsuccessfully).
Sleeps must be added to the guardian code in order to make both X and Y actually go to the "transition" state.
I have also removed some logging commands in the run method (as these continually output garbage to the logfile while the guardian loops over that method).