Adding more channels for the sake of investigation. As Ibrahim mentions, no glitchy behavior was seen leading up to this IMC lockloss, so this was either a large fast glitch out of nowhere or something else giving out. Seemingly all at once (or at least very close to each other), the FSS_FASTMON, RefCav trans, NPRO power, PMC high voltage, PMC mixer, and all IMC signals quickly change, so it's hard to tell which is truly happening first as there is lots of feedback between these signals.