Carts Teleport sometimes in Tunnels/Mines
When driving a Wooden Cart underground it sometimes teleports to the surface as if the '/unstuck' feature had triggered.
In my experience, this happens when driving on Dirt Ramps underground when I'm less than 5 blocks below the surface.
This is a know issue, Thanks for reporting it!
This issue has to do with ramps/slopes between Y level 30 and 29. I haven't seen this on any other levels.
However, a temporary solution is to clear any other blocks next to it for an example other ramps and blocks until this get's patched.