Board Thread:Skyrim/@comment-111.94.22.92-20131212155243/@comment-6881629-20151212094156

Firing short is on the Nightingale bows bugs list too but also a bug that can happen with any bow (it may or may not be the same bug though). If it is the same bug the bugs list for bows suggests switching weapons regularly might make it less likely to happen, also try drawing the bow and changing arrow type before letting go or fire one or two intentionally weak arrows off and see if it fixes it.