While playing the game (usually after a specific amount of play time) the arrow stack in my inventory will become 'stuck' in that I am unable to move them or add to them until that amount of arrows has been utilized. For example, I have 43 arrows and then pick up arrows or add to my inventory, it will not increase the value but place another stack in my inventory. The only way to fix this is to reload the game (save then play again). While using my bow, It will use the 'stuck' stack until depleted and then the issue will go away until it happens next time. Appears to be every time I play.