Cannot teleport an entity which is in a boat

The bug

My friend discovered a turtle in a boat and wanted it released, so I decided to try and teleport it to me using:

/tp @e[type=minecraft:turtle,distance=..10] @p

This resulted in the game confirming that the entity got teleported while in fact nothing had happened, see the attachment.

The reason why I suspect this to be a bug is because I can easily teleport other players this way. Even if I explicitly address them as an entity:

/tp @e[type=player,distance=..10] @p

This will teleport the player to me, even if they're in a boat.