Good Morning Ben, I tried some more things (changing the Constraints type in my file to match yours, but that didn’t make a difference…
I am now convinced, that is is not some setting, but the way you constructed the scene (especially how you added the Rigid Body Constraints. Look at the difference in the Outliner.
My file:
And yours:
What I did was:
and then CTRL+P:
which results in an Outliner like this
