When a boat is riding an armorstand with a Marker tag that is not 0,
it rubber bands entities that walk ontop of the boat.
Example:
1. summon Boat ~ ~ ~ {Riding:{id:ArmorStand,Marker:1b}}
2. Stand on the boat
MC-74508
Boat riding marker armorstand rubberbanding
Resolved
Fixed
0
Cannot confirm for 1.8.3 was probably also one of the desync problems with boats