Randomly De-Indexed Single Page

So, there's an issue with one of my sites for some unknown reason.

Google just randomly decided to de-index a page of mine, it's had no links built to it, I threw it into GSC and it came up with Crawl Anomaly - which is usually because it's blocked in Robots.txt

Checked Robots, fine, checked index tags, fine, checked canonical, fine.

It's just the one page, and it happens to be one of my highest visit pages....

I ended up reuploading the page, slightly tweaking the URL and redirecting the old one to the new one, but I'm probably going to lose quite a bit of money in ad revenue over the period it takes to recover.

Anyone experience this or have any idea how this could happen? For the life of me couldn't figure it out.

Few days ago, I was facing the same issue. Most and important pages of my website were deindexed by Google. I was not to able understand that what is going wrong with my site ?
But now everything is fine.
So two things, I have noticed at that time. The first one is Google update, second is unsecure website means (http).
If your website is secured, then it may be Google update behind your issue.

For the last two weeks or so, I get this quite a lot with new posts... indexed, de-indexed, indexed again, and so on.
Only with the new posts though.

Yeah it's not a new post, it's one of my older ones so I have no idea

It's HTTPS secure, never had an issue with it and to be honest haven't made any changes on the site for about a week before the indexing issue - didn't change anything to cause it

I’m having the same problem with one site.Everything was okay and then suddenly rankings dropped by 70-80% overnight.I have checked almost everything and it seems i dont know what is causing this.Does anyone know what could have caused this? Is google really screwing up things again or is it just me

praetserge said:

For the last two weeks or so, I get this quite a lot with new posts... indexed, de-indexed, indexed again, and so on.
Only with the new posts though.

Click to expand...

Same. It will reappear.

Eventually it came back. Wasn't a new post either, about a year old and my most popular post, hammered my as revenue as it took about a month to get back.