I have the same thing happen.The hooks on these are smaller, I think 1 or 1/0. I noticed the action wasn't affected with a stinger. But they were just barely tapping it. The tapping lakers are hard to hook. The ones that usually hit just are a little added weight or the line will go slack, sometimes the jig feeling weightless. Those ones are easy to hook, as I believe they are the ones that suck it in. A guy fishing the same lake with an aquaview say they will come in when the jig is sitting on the bottom to investigate it. He says when they strike, they ease up to it very slowly and almost suck it in like a bass sucks in a soft jerkbait. The smaller lakers, around 16" or so, generally will tap it. The 18 - 25" lakers just suck it in lightly. The big ones either just grab it and slowly move off, or hit even lighter. Seems the bigger the mack, the lighter the strike. However the very large one I hooked on a tip up last year, which was 20 pounds plus, tripped the flag on my windlass and ran off line pretty steadily. Once it was hooked, it screamed off dozens of yards of line in seconds.
Pardon the tangent, but I just think it was because it was sunny, high pressure conditions. Lake trout in these conditions in Colorado are very, very fickle.
Tyler