Minecart Glitch

When I enter my minecart, everything is fine.  When I decide to exit my minecart over a bridge that has only 1 block depth which holds the rails, I end up falling through the floor. It caused me to die on my world that I had maxed gear in over a lava ocean in the nether. Please fix this, because this has been an ongoing issue for many patches and I would SERIOUSLY like to not have anymore annoying bugs due to this minecart glitch. Please.