I think Crossbows need a bit of nerfing, this has nothing to do with that bug...or does it?
a crossbow should require a lower dex stat rqrmnt than a Self-Bow to use, but should cost more action points to actually use it, a crossbow should in no way approach the rate of fire that a self-bow can achieve, unless it is a Chu-ko-Nu and I am pretty sure it isnt one of those.
Just a suggestion.
Thanks