BTTV username replacement randomly doesn't work

I’m using the username change options, but it doesn’t always work. I can have a list of messages where every username is as I’ve changed them, then some of them suddenly doesn’t work. It seems like this primarily happens to my own username.

Using Chrome on Win 8.1.

Is there a reason why you would give yourself a nickname? That doesn’t make any sense.

Because I had to choose a different nickname than I usually use, as the other one was taken. I would’ve switched long ago had I had the option.

I like to shorten down usernames to make them easier to read and to waste less space on the actual name.