Earlier quoted context omitted.
It's an example of manipulation. Facebook removed an important item from my "news feed."
Did they arrange it so that you didn't see that post (why would they?), or did you just miss seeing it, or is it just ranked poorly by their algorithm? Seems like there's a lot of possible explanations, it doesn't seem obvious to me that it's Facebook's fault/
Something like this happened to me too (though it was about a newborn baby). FB simply decided that some of my contacts are not worth showing up in my feed. Some other instead keep popping up, despite me clicking "Hide post - See fewer posts like this" like mad.