The article describes how it’s meant to work, but I just did a spot check with some common words where both should be accepted (知道，下面，上邊，時候 and 先生) and all of them work on the website, but none work in the most recent beta. That’s definitely a problem and I’ll look into it, thanks for bringing this to my attention!
Just to clarify for @jkmcameron, though, this is unrelated to the question you asked and all your cited examples work as intended in the app!