I never made updated plots for the lock duration and prevelance of the DARM glitch locklosses for the last couple months of O4c (up to Sept 1st, 2025, up to Oct 1, 2025), so here they are. The performance during October and November mostly line up with what we had been seeing in August and September following the bias change (86027).

Through October and November, the frequency of DARM glitch locklosses, and locklosses in general, was still lower than they had been before the ESD bias change. October went realy well. November wasn't the best month for ETM glitch locklosses - we had 8 locklosses due to ETM glitch during the month. That's only slightly worse than the amount we saw in August right after the bias was doubled, but during November we were locked for less time overall due to O4c ending on November 18th and PEM week not requiring us to keep the IFO locked overnight or on weekends, so that's not the best. However, we still had longer locks on average during November vs before the bias change.

O4 DARM Glitch vs All Locklosses
O4c Lock Length Distribution
O4c Lock Stats