Invisitext Button Appears for Me but Not Other People?

[Karmic Acumen]

I've used invisible text in a post recently, and I've been told by more than one person on this site that the button that should show up to reveal it... doesn't. I've also seen it talked about in Rants, and it seems that most people really don't know that QQ does, in fact, have this feature. Or should. Almost all the mentions of it have to do with SpaceBattles and how unfortunate it is that QQ doesn't have the same thing (when in fact it does).

I'm talking about this.

It shows up for me fine, but not for everyone else apparently. It's a bug, right? I noticed that the button only appears if you use invisible (transparent) text in the post, for others it doesn't exist. I'm assuming the problem is with that toggle on/off Xenforo function somewhere.

EDIT
Someone just told me that it's only missing on the default Light and Dark themes, and on testing this indeed seems to be the case.

 

[woodzrox]

I mentioned it in your thread but I'll put it here too, I looked and the Dark and Light styles are the ones missing the invisitext button, all the others have it.

 

[Karmic Acumen]

I mentioned it in your thread but I'll put it here too, I looked and the Dark and Light styles are the ones missing the invisitext button, all the others have it.

Click to shrink...

Yeah, I've confirmed it too, now. I always use Blackened High Contrast and it never occurred to me that it would be this.