BSplayer forum user
kulakov found a bug related to "Global keys"
It's hard to sum it up in few words, and since he already provided us an example on how to reproduce the bug and how to circumvent, it I think it's better for me to link here his posts, so you (BSP devs) can take a look at the player behaviors described by him and find the way to fix this odd bug:
BUG NOTIFICATION POST BUG EXPLAINED POST
In that thread, he also provided a couple of nice and simple suggestions on how the player can be improved and made more user friendly, so please take a look at those suggestion too:
SUGGESTIONS THREAD
Good reading ;)