I understand your point on reviews, but I’ve seen several threads where sellers were warned just for asking (for simple reminders) because warning system is semiautomatic now.
From what I’ve learned here, even 2-3 cancellations in 60 days are enough to throw gigs to the last pages, and it’s impossible to understand how it works.
One clear thing is that this kind of indexing happens on Monday at 12:00 (at least for my gigs) and it doesn’t update in real time.
In one of replies, CS mentioned that they don’t want to see gigs, which are “not active”, so out of the office mode could be the reason too.
I really hope you are going to recover your positions very soon.