Hi, has the button on “Character Info” window for changing titles been moved in the new UI changes? Can’t seem to find mine there… Picture
That’s very odd. I just checked my character and there are 3 icons above item level - Character Stats, Titles & Equipment Manager.
The only thing I can think of is that an add-on or something else has affected it. I would suggest you reset your UI - https://eu.battle.net/support/en/article/7549 Hopefully that will solve it.
Try moving your Interface and WTF folder to your desktop then look again. Afterwards move them back.
Thank you Ananda, just wanted to confirm it was indeed my addons playing up…Now if only I could figure out which one is the problem 
Thanks too Dottie, I used your suggestion as a workaround for now, I can at least change to my shiny new Veilstrider title until some update fixes that button 
You could do as Dottie suggested and move your interface folder to desktop, create a new one then move your add-ons back one by one to see which one is the culprit.