I've seen them do the same thing when my buddy & I were LS fishing a local lake. I had 6# test hi-vis on one rod, 8# test clear on another, and he was using 10# test fluorocarbon. Many would come up to meet the jigs & then turn away. Sometimes I would shake my rod tip a little and get their attention back, but only rarely did it make them commit. My buddy tried that early on in his LS fishing days and it actually spooked the fish. He also noted that in some instances when a fish was caught out of a group hanging around a submerged tree ... the other fish would move to the opposite side, away from the caught fish.

What few times I've fished with him, flipping double jig rigs out past the cover and letting them glide back over the tops or letting the jigs fall down into gaps in the cover, I've rarely actually felt the "thump". Most of the time when I've caught a fish it's been when I see fish at the jig and raise my rod up & feel "weight". My buddy say he feels the fish hit, most of the time, but he's been LS fishing a lot longer than me (and a lot more often).

One of the things I have learned while fishing with him is how slow the jigs fall, yet how a little rod tip movement makes them jump farther than what you'd think. Sometimes color changes work & sometimes downsizing works ... then other times they don't. Then there's times you leave those fish and go to other brushpiles & come back later and catch a few more.

Livescope can show you whether or not there's fish on a piece of cover & where on that cover they're holding, but what it can't do is make them accept any & every offer you throw to them ... alive or artificial.