I’m curious if it’s that or just a glitch with that note. That one was uploaded directly using Primal’s CDN. I just tried posting it again (see below) using Nostr.build instead and I see it in Primal. So they could be filtering. A bit over aggressive if so. Maybe nostr:npub16c0nh3dnadzqpm76uctf5hqhe2lny344zsmpm6feee9p5rdxaa9q586nvr can confirm one way or the other.

nostr:note198e6cl8685u9z40fwhh94fje2pn7s25uwesqmetxuz86878lf6cs9hr7zp