A simple U-shaped hopper-minecart route that worked before the 1.21.20 update no longer works because the hopper-minecart continues to run into what I can best describe is an invisible/imaginary wall and simply stops. It does not bounce off of the invisible/imaginary wall. Attempts to create spacing around and above the hopper-minecart did not solve the problem. That car behaves almost like it ran into a cobweb or an unpowered rail, but there is no cobweb and all the powered rails are powered. The track around the affected area was removed and replaced, but this did not solve the issue.