Yeah I have the same problem. Not just that I can't eat when I'm binding, but it's also a lot harder to breathe. It's probably just because my binder(s) (sometimes I wear two, usually I only wear one though) are too tight. I've spent a ridiculous amount of money trying to get a decent binder that gets me flat but doesn't make me feel like I'm Darth Vader *insert clip of Darth Vader trying to breathe here* but they've all either been too big, or too small, or haven't gotten my chest flat at ALL (when I tried a sports-bra style binder, seriously, all it did was make it look like I was wearing a freakin' push-up bra! Insane!).