Sometimes, with the minecart experiments enabled, minecarts can get stuck in the wrong direction on a powered rail looking visually odd as shown in the following image

Steps to reproduce:
While there might be other situations that can cause this issue, the following setup i found to reproduce this bug consistently.

1. Make sure to set the minecartMaxSpeed game rule to anything above the default of 8
2. Construct the following structure out of powered rails:
   
3. Place a Minecart with Chest or Minecart with Hopper on the first diagonal rail on the left as pictured below
   

Observed results:
The minecart will fail to snap to the rail direction despite being completely off the original rail, as shown by the hitbox in the first image.

Expected result:
The minecart snaps to the rail direction.

Notes:

• This setup seems to work reliably only with Chest or Hopper minecarts, rideable carts do not have enough momentum and actually snap to the rail when empty
• Hopping on to a rideable cart while on this setup can cause the cart to get in the wrong orientation too, however it's less reliable
• My testing was done with /gamerule minecartMaxSpeed 10, although it seems that any value above the default of 8 will work, such as 9, 30, or even 1000 which I tested.