The minecart is supposed to stop on top of the hopper but in bedrock it does not unless you purposefully slow down the carts by standing in front of them or making a lot of slope
The attach file isn’t working for some reason (maybe because I’m on iPhone) but a link to a photo of the same mechanism I used is
https://images.app.goo.gl/WwPERtb63ceWn4Ft6
The minecart is supposed to stop on top of the hopper but in bedrock it does not unless you purposefully slow down the carts by standing in front of them or making a lot of slope