I performed the lockloss investigation for Unknown Lockloss list (nightly observing) which was listed in the monitor page.
For the lockloss at 2024/10/16 22:13:41 JST, the cause was the transient behavior of the laser light source for ETMY MN oplev (Fig), which is same as klog#31501. It might be the time to prepare the tag for this lockloss.