Your craft is on a collision course with the planet bug.

Steps to Recreate (Any sandbox)
1. Load in a rocket
*Rocket has a detachable command pod with a heat shield on the bottom and a parachute on the top
*Rocket must be able to land
2. Launch
3. Land somewhere random (I found it in a crater field thing)
4. Open the menu (esc key)
5. Click End Flight
6. Click Save & Exit
The popup that says "Your craft is on a collision course with the planet" should appear even though you are landed and perfectly safe.

Steps to Recreate (Attached Sandbox)
1. Resume flight for the rocket named "Rocket 1" (the one on without solar panels)
2. Open the menu (esc key)
3. Click End Flight
4. Click Save & Exit
The popup that says "Your craft is on a collision course with the planet" should appear even though you are landed and perfectly safe.