As suggested by Richard/Robert to look for electronics issues, I trended the SUS OSEMs before and after start of DARM Range Fuzzy period 2020/11/23 7:00UTC, between 6:00UTC and 8:00UTC and zoomed into [s-trends]. Previous troubleshooting in 74455, 74377, 74383.

Trended ZMs, IMs, RMs, OMC, OFI, OM1,2,3; ETMs, ITMs, @ M0,L2, L3; BS @ M1, L2, L3; MC1,2,3, SMs, PRs, FCs @ M1, M2, M3

I saw nothing change at the 2020/11/23 7:00UTC time. Only thing of note is that OFI, OM2, and ZM4,5,6 has louder periods every ~15 seconds, plots attached of ZMs and OM2. This is not a new feature.