Can anyone else not link AO3 pages to Tumblr right now? Any advice?

Trying to post my latest fic to tumblr and the "insert link" function just turns the url to normal text instead of turning it into a little box like tumblr normally does. I tried with other addresses like google or random sites and they all work fine, it's just AO3 that's unlinkable atm. Anyone else notice the same thing? What problem could this possibly be?