The latch on these handles is metal.
If you drop it on its "nose" (as it's very easy to do, don't deny it
), it'll land on that metal, deforming it. While it still appears "normal" at a basic glance, when you plug it into the car you'll be in for a nasty surprise.
That's what gets it "stuck" in the car. Because the latch is now bent, the full range of button motion isn't enough to unlatch it. This is also why the car gives the "beep-beep-beep"
- which means solely
one thing: the release button is being held down, and the car is saying "let go of the button, dummy". If you ever see your Leaf flashing the 3 lights and beeping, it means only a problem with the handle latch - nothing more, nothing less.
So, to fix this, you just have to reform the latch. When it's plugged/latched into the car, you have to use some tool to lift-up on the button of the release latch, so it bends back into shape. The latch on the car end will act as the other leverage point that you bend against. The "lock hole" in the button should eventually be exposed when you're no longer bending it. It might take a little effort to bend it back into shape, but then -- provided your Leaf also doesn't have the lock into the "auto/on" mode (turn it off! to the middle position) -- it should just unlatch and remove normally.
Provided the latch is bent back to its original form, the Leaf ought to charge normally.