Locked for almost 20hrs but the range has been trending down slowly for the past ~10hrs, with the exception of Cheryl's IM alignment change ~5hrs ago.

Looking through the summary pages for clues, the only thing I could find are the strain seems a bit noisier around 12/13hz and the CAL accuracy ASD ratio seems to also be a bit worse as well. Roll modes don't see any higher than usual so I don't know where this 13hz noise is coming from, and the CAL ratio I'd guess is a most likely a symptom way down a chain that could have come from many places.