The same thing happened to me last week fishing the KY. Approximately fifty percent of the bass hooked came unbuttoned even with a wide gap very sharp hook. The next day I had only one to come off. I was beginning to think I need a stiffer rod for more hook set. I have noticed in the KY, that bass once hooked walk on the water more and are a little more meaner than most other lakes. I had a 5+ last week that simply was all over the river before giving up. Oh, I had a 3+ bass that had colloration that I have never seen before. This bass was black...I mean real black with the extremely bright red gills. I have caught a lot of bass in my time but I have never seen a truely black bass before. One beautiful fish.