Mission flight mode waypoint tracking error

Hi. I have a question about fixed wing mission flight. Recently I try waypoint flight for 2 times. At first time it was pretty good. Plane tracked correctly all waypoints and auto landed. But second try was a little bit different. After auto takeoff I had to interrupt the mission and land dur to some other reason not flight. And start the mission again after a few minute. Plane auto takeoff and reached first waypoint. After first waypoint it start to deviate. Obviously it was tracking waypoint but with very bad accuracy. And finally hit a tree. (No big damage luckily). I tried to understand what happaned from logs but I’m confused. Can anyone help to understand what was the problem from logs ? Thanks.