I've noticed that sometimes my postings do not appear on Home. I've noticed some postings of people I follow do not appear on Home. I've checked and can find them in Feed and on Discovery. I can't see any common denominator to this oddity.
I have an example.
At about 10am EST, I posted this.
It does NOT appear on Home, although it does appear in Feed and in Discovery.
At about 1pm EST, I posted this.
It does appear on Home.
The difference? The first post has a clipped version of the picture. Does the size of the photo explain its absence?
However, in saying that, I don't think size is a factor in the other missing photos I mentioned.