Why do bows jump when played?

chin

Bad camber, bends in the bow, and yes, too much tension. Also you might want to try a heavier bow. If you need to tighten the bow to where there is more space between the hair and the stick than the thickness of the stick in order to play without the stick grinding into the string, the bow probably has weak wood that will probably not respond the way you want to anyway if the camber is already correct.