From what I have read, new members sometimes (always? I don’t know) have their initial comments checked first before they’re posted. It didn’t used to be that way years ago, but I have read more than a few comments about this.
I wouldn’t worry, and I’m sure it won’t happen for long, maybe it’s over now.
I guess to keep out bots and serious tomfoolery. Sometimes people managed to post porn photos before the mods could stop it, and then they’d have to delete stuff.
LOL, beat me by a minute.