Objects keep changing position with World Origin Rebasing turned on. How do I keep them in one place?

Hey there.
I’m currently working on a single-player space game in Unreal 4.26.2. The goal is to build a single solar system where the player flies between planets and completes missions. I’m using World Composition with World Origin Rebasing to make the scale more believable. The star is in the middle, at coordinates 0.0.0, and planets are in various fixed positions around it.

Every time I restart the engine with Origin Rebasing on, all objects are moved relative to the player pawn. So the star will suddenly be at some insane X, Y or Z value relative to the player. When I just had a few objects in the project at a time, it was easy to just put them back at their assigned positions, but at this point the system is getting so crowded it takes minutes just to set everything back where it was supposed to be. Is there any way I can reset the positions of each fixed object whenever I exit the player or by pressing a button? Origin Rebasing determines the origin point based on a player camera. Maybe I could do something like add a camera at a certain position that never changes and let the engine rebase the origin point based on that camera whenever I enter or exit play mode?

I hope I’m explaining this right. If not, feel free to ask for clarification.