There isn't something there. Trust me. FT fits their feet. It doesn't fit yours.
Things you should do:
-If you don't have a footbed in there, get one. Custom preferred, but if you don't have the cash, get a superfeet blue or green.
-Do a shell check on yourself. Take out the liner, put your foot in until your toes barely touch the front. Flex forward, and see how much room you have behind your heel. 3 fingers? 2 fingers? 1 finger? This will let us know if you're even in the right sized boot. You might be in a boot that is too big.
-Tighten your buckles. They could be a bit loose. But don't overtighten.
-Stop landing backseat. Might be a subconscious thing, but try to avoid it. Landing backseat in a boot that doesn't fit will make shit bad for you.
-If you do a shell fit and its a tight 2 finger or a loose 1 finger, and you put the footbeds in and it still hurts, try putting a heel lift in.
-Try taking your spoilers off. If you ski backseat, these basically are making your problem worse.