Posted it on the discord but posting it here for reference later, in case it gets lost.
Since Yellow implemented the new TF cap of 985, if you set it to TF +15 and try to do a BiS with Antorus gear it spits out an error. Here's the specific one I got
Object reference not set to an instance of an object.
ticket number: cc699a3b-28f9-4699-82bf-535bbc816f2b
I believe this is caused by the artifact being over item level 1000.