Today we had one lockloss from a growing 1 Hz oscillation. It's hard to tell where it is coming from, but it appears in several ASC signals and the buildups. We have tried several things in the past to avert this problem. Today I tried bumping up the CSOFT P gain to 25. This action seems to be coincident with the oscillation turning around and damping back down. I'm not completely sure it helped, but it's something to try! Before today, it has turned around on its own without intervention. It also doesn't happen every time we lock.