I was able to get a reproduction:

* The platform is flying towards shattered planet.
* I shift-right-click the settings from another platform and shfit-left-click to place them to this one.
* At that moment, the thrust is paused, Nauvis is set as the destination in the schedule, but not in the ...

[What's wrong]
I'm observing a platform in Automatic mode with Nauvis selected in the destination list that is actually flying to the shattered planet. In the right pane it's the shattered planet, in the destinations it's Nauvis (see screenshot).

[What did I expect]
Regardless of whether my circuit ...

What did you do?
Created 1 smaller and 1 much larger platform with 360 degree collector coverage, processed all asteroid chunks the same way and checked the production graph. They are stationary around Nauvis and don't have any thrusters. All machinery is equivalent except their size.

What ...

I just learned about the Shattered Planet from a menu on my station's requests. Then I searched online and this came up, posted a few hours ago and looking mind-boggling. I'm making science on Volcanus and Fulgora and just got the Mech Armor, so I guess ... mid-game? This is way way end game :D Oh ...

Just tested this with Factorio: Space Age 2.0.11 on macOS Sequoia 15.0.1 and it worked perfectly, the key being the last post by nugget_in_biscuit and not the information provided before that.