Minecart doesn't go in hopper and cause Unlimited Minecart in desination chest

I just made my automatic storage in my home and i found this bug

first i place minecart same as 2556-01-10_15.14.48.png

inventory of minecart 2556-01-10_15.14.51.png

Then I put coal in 2556-01-10_15.15.01.png

minecart bump into cactus 2556-01-10_15.15.09.png

My Chest full with minecart 2556-01-10_15.15.14.png

When i remove some it come more 2556-01-10_15.15.38.png

Update:I hit the minecart and the minecart doesn't go in hopper and cause unlimited minecart but when i collect minecart on hopper it stop

Note: when 2 minecart is on hopper will cause this 1 minecart don't cause this