Last night we went out of observing for ~1 second with 2 SDF diffs on syscssqz. I can't get the channels, but we will keep an eye out.
These two channels have briefly dropped us out of observing a few times this week, H1:SQZ-FIBR_SERVO_COMGAIN & H1:SQZ-FIBR_SERVO_FASTGAIN. Seen here: alog71840, alog71652, and alog71900.