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https://youtu.be/5oybRd4FwNg
I am applying a model to a custom boat and it has some problems.
1: The model rotation rotates by itself to 0 if the boat is stopped
2: If there is 3 or more players in the boat, one of the players gets "kicked" from the boat after the boat gets far from where the player mounted the boat. If the boat gets near enough where the player mounted the boat, the player is teleported back to the boat (see the video to understand)

/version: This server is running Paper version git-Paper-388 (MC: 1.18.2) (Implementing API version 1.18.2-R0.1-SNAPSHOT) (Git: fc9ee65 on ver/1.18.2)
ModelEngine: Demo vR3.1.3

changed the description

1: It looks like when you're moving the boat, you're not adjusting the entity's head yaw to be also facing towards the traveling direction, causing the body to rotate back to the head rotation.
2: Internally the mount updates the position of all mount controllers, but something you did cause the mount to not update the rider's location of the third passenger. Might be another singleton problem or you forgot to set the owner of the controller.

1: How could I do that?
2: No, I already fixed the singleton problem as seen here:

Well, I'm not quite sure then. Unless you can also replicate it with meg's default controllers or you can show me your entire project, I can't really debug like this.

this is the controller I am using: