This is really similar to what happened in November. The local results started fluctuating before Google announced the core update. It went on for several weeks where we saw giant ups and downs and then eventually stabilized. The end result was definitely different than it was before in October but it wasn't nearly as varied as when it was rolling out over the month of November.
Thank you. We recovered fully after November. This feels like deja vu. And it's hard to believe that we went from number one consistently to only having #18 relevance. (And I have performed two searches where we were not visible at all in the results).
To further complicate matters, just as this was all happening, we wrote a mid length blog post about how covid is affecting our industry. We wrote a longer one before, then had a drop within a few days or less (also when there was reported flux in our industry), then deleted that blog post, with a 410 code, and submitted a removal to GSC. Within a couple of days max, we were back to our old position. Then we received a link to that page (which we gave to the person before we deleted and they didn't recheck before publishing). Since it was a decent link, we republished the post but with shorter content. Within another day or two, rank dropped again. So now we deleted and redirected that post, using a 301 redirect, to a seperate website. And of course there was reported flux both times -- so this post may have had nothing to do with the drops or the rise back up.
I know this all sounds confusing but, I swear, there have been no other changes to our site or GSC. So this had to have been caused by one or the other.
If rank doesn't come back next week, I'll be republishing then deleting using a 410 code, then resubmitting to GSC. I can't imagine the type of redirect for a deleted post would matter but I'm not Google.
And all of this could be totally related to the flux, and unrelated to these posts, which was happening both times we published this post. Like the same day, but reported flux, both times. So that sucks.
Just another fun waiting game.