I had eight identical results and called it a rule. Four posts by other people took it apart in one reading

For a week I published articles on a platform and noticed that each one carried a noindex directive

for a while after publication, then lost it. I checked this eight times. Eight times out of eight,

same result: excluded at first, clean later.

I wrote that up as a probationary window applied automatically to new posts. It explained

everything I had seen, it was falsifiable, and it was wrong.