Someone in a thread not too long ago, might have been Bill Cody but not sure, talked about their predators getting "lazy". Something like they had learned to feed off the commercial feed and quit eating their proper diet of bream. Seems like a complaint about all the BG biting swimmers there were so many.
As I recall, his solution was to cut off the feed bag for a while. The predators got hungry and started seriously working on the forage fish.
If it was Bill or whoever it was that posted it, maybe they will chime in and relate.
It has been a month or so ago, but if you have the time to go back and find it, it might be at least part of your solution.
I'm no expert, just relaying what I think I've read. Maybe you need to cut off the feed bag for a while? Maybe your bass have learned to eat feed instead of fish?
We have this problem in our little pond. I feel sorry for someone that tries to go skinny dipping in there!!!lol
I hope that slows down this year and next since we stocked ours with fingerling bass last summer.