If the lake isn't very deep then the thermocline is gone and the lake has assuredly turned over already. I am guessing you have to have water temps in the 60s by now which means there is no significant thermocline.
I promise you that it is the hooks on the lure you are throwing. Put Mustad Triple grips with short shanks if you want to but I would also up size to a 4 at least on the front hook. The front treble can be bigger because of the way traps run nose down in the water. If they are biting traps then the should also bite a chatterbait with a swim trailer like a magic shad. Just to give them something different to look at.
Seriously, take a look at your hooks. They should stick into your fingernail without any pressure applied to it when you drag it down the surface of your thumbnail. I promise you its the hooks. Gamakatsu makes a nice round bend treble but I like the offset on the mustads. If you are fishing over grass, which you obviously are, if there are patches of dead grass next to live grass, that is where you want to fish early and late in the day. Rotting vegetation warms the water by a degree or two and the green grass provides the oxygen and they will just sit on that grassline. Are you using a 7' rod or a 6' and I know you said it is a medium action right? Try switching to a longer rod like 7'6" or 7'3" medium heavy and heavier flourocarbon line as well and you won't lose those fish. My guess is that you're using too short of a rod with not enough backbone either. Rattle traps are reaction baits so they will try to kill the sumbitch not suck it in. Try those two things and let me know bro.
I am using a 7 medium action open face. I bought it for my sister but I get a lot of use. I will have to ask you next year what to get cause the season is just about over and it's time to put money into more ice fishing supplies. :facepalm: I am spending money on the supplies and my buddy is building an 8 x16 ice shack, crank down on wheels, he says we are putting a big screen in it and having diec tv. I said that's fine just make sure there are beds in it. Me and my dog will be fucking living in that thing.
You are right they try to kill that bait. That's why I am glad I am using them cause they drill them and they jump as high as I ever seen, It's not a big deal that they spit it out unless its the Monster, still have caught my biggest fish on Tru Turn hooks this year using sinking plastics and texas rig craw, when I got em hook set with that, there is no getting away my friend. It's a learning experience, oh I will say with the crank bait though you are getting more aggressive, better fighting fish by nature. Soft plastics catch a lot of small ones, the cranks seem to just attract bigger fish small ones less frequent