Every time I re-open Indesign I lose my preferences.
I lose my preferred measuring unit and language preferences, I lose my preferred workspace and lose all my saved template sizes.

I have tried to re-install Indesign from the Creative Cloud app.
I have tried un-installing and re-installing absolutely every Creative Cloud application, including the CC app itself.
I have tried forcing Indesign to forget preferences at startup.

No luck with any of those things.

InDesign 15.1.2
Mac OS Catalina 10.15.3