Minecraft Username:
sngtx
Brief Description:
Whenever attempting to go uphill in a minecart, the moment the rail begins to go uphill the minecart will snap back and begin rubber-banding.
Instructions:
1. start on a flat straightaway with any kind of rails that ends with an uphill slope of rails
2. begin on the straightaway and move towards the uphill slope
How many times did you recreate this bug?:
Every time I tried. Also got my friend to try and the same thing happened to him.
Result:
At the point the flat straightaway turns uphill, the minecart begins rubber-banding
Expected Result:
the minecart should continue up the rail.
Evidence:

the image demonstrates an example of when the bug happens, it happens anywhere the minecart goes uphill, not just that specific spot in the picture