Can not click in runescape screen center

Sometimes I’ll be unable to click in the centre of my game window, but I’ll be able to click far to the left and the right of this area. This “dead click zone” is almost as big as the Hero, Adventures etc interfaces. I’m not sure what the exact size of it actually is though.

When trying to click in this area, no clicks are registered by the game, but when clicking to the far left or right of this area, clicks will be registered.

I don’t know how to reproduce this bug, but it seems to randomly occur for me at the moment from time to time…

I’ve been using the Java version of the NIS beta whilst I’ve noticed this happen.

Sometimes, right clicking on other players in the area won’t work for me either.