Yep, They've been doing it off and on to me for a few weeks now - no rhyme or reason to it, just every now and then I get a post flagged, I request a review, but even though they say I'll get an update in a couple of days, I never do and the post never returns. I've just had another one flagged today. Incompetent algorithm coders would be my guess. It's the only sort of programmers that Facebook employ these days.

Pff....well....that is not nice 😞

I 

I just ran into this today.  Still waiting to hear back on the request for review, but It looks like they updated their Spam policy as of June 27th. From what I can see, I suspect that they take issue with the link generated by Strava saying "Follow <name> on Strava to see this activity. Join for free."
Potentially could be seen as running afoul of:

I had this one rejected yesterday because of this policy, too.  

There wasn't any text on mine encouraging follows, and whatever I'd written into the FB post was innocuous.

I also asked for a review. No word back yet. 

So frustrating. 

I've requested reviews on two of mine now - never heard back from Farcebook on either of them, so don't hold your breath!

This has been randomly happening to me too for about a month now. Facebook hardly ever gets back to me 

👋 Hello, 
Thanks for your posts and sorry for the trouble. Unfortunately, we cannot override Facebook's policy or explain why they made that decision. We recommend contacting Facebook support to request more information about the case.
 
I will also pass this info to our team for awareness.

September 1, 2024: Facebook removed my July 20th post of my first bike ride to Marshfield, right after I added the Strava link:

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I survived my first bike ride to Marshfield. With rest breaks, it took me just over four hours to cover 35 miles. Not bad for 62. Thanks to Wheelworks Bicycle Stores in Somerville.
https://strava.app.link/y17NxJJhxMb
#davesbike #davesbikerides #bikinginboston #cannondale #cannondalequickdisc3 #strava #acewheelworkssomerville

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August 13, 2024: Facebook removed my post about taking the Minute Man trail all the way to Bedford for the first time. How can bragging about this on my own goddamn page qualify as spam?
https://www.facebook.com/illdave/posts/pfbid02ak2WFe2rU4Euv7X6q3LuAAPEtbhgZqbXCLHVjChXQzqX5KNAxa2WmFHX2SbvcdVMl

Oddly, Facebook didn't remove the Strava link in the comment.
strava.app.link/FrxGmkXz2Lb

It has nothing to do with spam.

The entire objective of Facebook is to own your internet activity. You cannot get a link to a photo on Facebook and post this on another web site either. Allowing you to link to a profile on another social network site is something Facebook see as a loss.

You might social with people off Facebook, and they will not be able to sell your info for advertisement.