Just wondering: is this issue caused by the fact that I still use OS 15.8, or it is happening even in more modern devices? Scrivener for iOS shouldn’t have been updated recently, so I guess it happens everywhere.
I’m pretty sure what you are describing is how it’s supposed to work (these are stock toolbars after all). I agree it looks a bit silly and distracting, I commented on it as soon as it started working that way (maybe iOS 7?).