This is not intended behaviour, but something that isn’t all that easy to fix. I’m not going into details right now, because its late (but if you or anyone else is curious, I will happily do so after some sleep).
I’d try @merlin’s Qukeys plugin, which is a third way of doing something like SpaceCadet and DualUse do. I have not tried it myself, but from its description, it is the best of the three.