Send Boat to Waypoint, it goes in circules backwards

Hello,

I’m new to Pixhawk, so I’m still learning.
I’m creating an unmaned catamaran using PIxhawk 6C and permoed the the Rover setup as instructed on site.
I can remote controlle it perfectly. But when I send it on a mission, it navigates backwards and spiraling to outside.

Here is a link to mission planner video

I want to debug it, but I don’t know where to start and where to look at.
Can anybody give some help? Thanks!!!

This is with Ardupilot, right??

You might wanna ask on Ardupilot discourse.