The recent spectrum seemed to keep breathing around 60Hz (Fig.2) and high frequency ranges (Fig.3).
So the calculated BNS sensitivity became in the range of 5 Mpc. 
 

One concern is that Fig.4 shows not only the green beam images on PR2/baffle that was recognized as before but also a red or IR (violet) image that newly appeared. This might show the some optical alignment and/or beam paths differences around IMMT1/2, PRM, PR2 and PR3. If this red or violet image disappeared at the timing of a lock loss, it should be IR from somewhere.

Please note that this camera has IR filter. So a weak IR cannot be detected. If the camera shows violet images, it means that IR is relatively strong.