Just a quick update here - we believe this to be resolved. If you happen to see this happening again, please let me know (screenshots and timestamps are greatly appreciated).
No record today (3/24/2020), but we do have 2,266 users online.
Ps. If you're really online hit the like button so that we can confirm!
I wonder if this is related to the subscriptions bug? I have a vague feeling both happened around the same time last year ...