I was also noticing a little weirdness with the space bar, almost as if it wasn't registering my touches once in a while but I thought maybe it was because I switched from a note 4 and the keyboard buttons were slightly in different spots. Do you have the zagg tempered glass screen protector on your phone? I've noticed bad halo and the keys near the halo sometimes don't seem to work well so I'm starting to think it might be an issue with the tempered glass screen protector. I found a work around by reducing the size of the samsung keyboard so that no keys are near the halo
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