Factorio Forums

Steps

1. Load attached save
2. Go to SOLAR VOYAGER ship
3. Open ship hub; notice that it currently has Solar system edge as current station
4. Click Add station
5. Add Shattered planet
6. Now you can see UI flickering in schedule list and in information panel under minimap

Surprisingly, it seems to happen so quick that can't be captured into screenshot or video, so I can't attach any.

Shattered planet works differently; if you don't add any conditions to it the platform will instantly go to the next stop in the list. This is so you can automate flying only partially towards it before turning around. I didn't check the save yet, but since you say your stops are only solar system edge and shattered planet, I'm guessing it's just alternating between the two stops every tick due to there being no conditions.