I’m on 8.1.4, currently.
I noticed that in Perspective, I have a button with an expression binding on the button text, and everything works great – except that when a page first opens up, a quick “button” displays as text in the button, then disappears. After some testing, this seems to be happening only because I have the text determined by an expression binding. If I remove this expression binding, and do something like replace the text with nothing, the quick “button” text goes away. Is this a bug, and/or is there a workaround to ensure that (when a view is first loaded) the button simply displays no text until the expression binding is evaluated?