Usually loosing them when they jump. Grass is not to heavy. Most fish lost are in shallow water where the only direction to go is up. Don't watch my bait most of the time, just wait for the rod to load up. Then I do a swing hook set. Left or right. Try to keep steady pressure without hossing them in. Have kept them hooked for the 1st time they jump but the closer they get to the boat, the more they get off. The fish I do land are usually hooked great in the roof of the mouth, or they are barely hooked on the side and have a nice big hole in their mouth.