Why would Hierarchy selection impact game behavior?

I’m finding that selecting different objects in the Hierarchy impacts the behavior in my game.

When I have my “Spaceship” selected in the Hierarchy, it is much slower to launch. When I select any object in the Hierarchy other than the “Spaceship” game object it launches at its normal speed.

It was previously working as expected, I have since added a Particle System and Audio Source. Toggling these off does not make a difference. I’m using Unity physics.

Why would object selection in the Hierarchy make any difference like this?

Any help is appreciated!

Purely speculation, but Unity may be lagging trying to update the inspector view every time a variable changes or something or rather on big GameObjects with a lot of stuff visible in the inspector. You can hide public variables you don’t need to see from the inspector by putting [HideInInspector] in the line above it, but I don’t know how Unity works so this may not make a difference.