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Here's a few things to check if you haven't done so.

Is it a Jiffy? When you changed the blades, did you make sure you installed them on the correct side of the mounting bracket? With a Jiffy, if you're not paying attention during the blade reassembly process, you can install them on the wrong side of the mounting bracket, and this will make your auger bind up every time.

Have you ever banged the blades hard on the ice, or dropped the auger? This can throw off the blade pitch and will cause it to bind at the bottom of the hole. You can try adjusting the pitch by shimming the blade with shim stock or a plastic playing card. It doesn't take much shimming to adjust the angle for a better cut.

Has your auger done this for a while or just recently? As the ice gets softer, the auger will cut more agressively and can bind up easier.

After you clear the hole of ice chips, take a look to see if you are cutting straight. In thick ice, it's easy to start out straight, but as the auger gets deeper into the ice, you can start to go crooked and not realize it. Once the hole is crooked, the flighting binds. It's also easy to get crooked holes with dull blades.