Lockloss @ 03:53 UTC - link to lockloss tool
No extremely obvious cause, but seeing as winds have recently gusted up to over 30mph and multiple suspensions seem to have started shaking about a second before the lockloss, my initial assumption is that this was wind-related.
Range had also started dropping for about 30 minutes prior to the lockloss, possibly due to the higher winds? (trend attached)
Back to observing at 04:49 UTC. Fully automated relock without an initial alignment, however many signals are shaky and acquisition took slightly longer due to high winds.
PI mode 31 started ringing up shortly after NLN. Guardian was able to damp it down, but not until mode 24 also started rising and damping started on that mode. Unsure if this is a coincidence or if damping mode 24 is actually what brought down mode 31.