No worries man! Just confirming my hunch is enough. I'm loving your mods btw (when they work for me lol). Work like yours is why I love this game and its community <3

It's probably due to a compatibility issue with Immersive Area Backgrounds, as this mod actually has to change more files than the Gatekeeper Cocoon (for context, the Gatekeeper Cocoon only changed the original prop anim and png files, while this mod has to change the cc_curio_props.csv file, as the original just takes the normal lockbox skin and there's no way to change the key boxes without also changing the lockbox). As for fixes... it would likely be very complicated, I would look into it but larger projects are taking my attention at the moment.

This does not appear to be working for me, I'm stilling getting the Courtyard+ lockbox. I had it over Courtyard+ in the load order and even tried moving it all the way to the top, still not working. Perhaps a compatibility issue with Immersive Area Backgrounds and its patches like I had with your Gatekeeper Cocoon? But moving this mod up in the load order didn't fix it like the prior mod.