Affects Version/s: 1.15.2, 20w11a
Fix Version/s: None
When a boat on ice is pushed by a slime block it normally flies off at high speeds but if a player is riding the boat when this happens the boat will stop at certain locations after moving a few blocks without colliding with anything, often at precise coordinates which seem to vary by location.
- Build the setup in the attached image
- Place a boat on the pressure plate on the side close to the slime block
- Enter the boat before it gets pushed
→ The boat stops as soon as you enter
If you are having trouble reproducing the effect then mirror the setup to bounce you back and forth as it is common but not consistent.