Photo Sharing From Flickr - Numbers Blocked by Filter??

[khertz]

I've been sharing photos from Flickr for years in my TRs but lately there seems to be something blocked in the string of numbers that I'm assuming is not getting past the content filters. Anytime I try to share one with 4 4 1 9 (without the spaces) it stars those numbers out and then I can't share the photo. Is there a reason that number would not make it past the filters that I don't know about?? It's just numbers!