When in the boat

/execute at @e[type=boat,limit=1] run tp @e[type=boat] ~ ~3 ~

does nothing claiming a sucess

when not in the boat it works just fine

/execute at @e[type=boat,limit=1] run tp @e[type=boat] ~ ~3 ~3

Does work when riding the boat

seems to be that under a horizontal distance of .25-.28 that it stops moving

I made a video here