Player stops ship movement

I want to make a boat, with a player who can walk on the boat.
Everything works fine but i have a big problem.
In the Tick event, the boat gets added force to move. That works and the player can walk around on the moving ship.
But if the player walks in front of a wall on the ship, or something wich blocks the player, the ship detects the player as a collision and stops moving.

Can somebody help me?

I’ve already disabled “Physics Interaction” in the Character Movement.

This is a very interesting question.
What force drives the boat to move?

I tryed “Add Force”, “Add Force at Location” and “Add Force local”

And another error appeared.
The buoyancy does not replicate correct.
On the server it works fine, but when i play as client, the boat is very laggy and does not move :’)