[General] Campaign object data keeps overwriting map object data

[ebontope]

In one level of the campaign I'm currently working on, the player will have no access to Wood and no ability to build certain structures. As such, for this level alone I want to change some of the campaign's object data by removing Wood costs and changing Techtree requirements.

For several of the custom buildings from the campaign object data, I've been able to change this in the map's object editor with no problems. However, one of the custom buildings now keeps resetting back to the campaign's default settings every time I save the campaign, no matter how many changes I try to make in the map's object editor. This is only happening to one specific building as well.

As you can see here, I've made map-specific changes to several of the campaign buildings in this map. Yet the Gold Stash that is currently selected keeps resetting to the campaign default settings any time I save my campaign. I want to remove its Lumber cost and Techtree Requirements, and they just come back every single time.

Does anybody know what could be causing this? I'm frankly baffled that it's only happening to this one specific building, while all the others aren't resetting and keep the map-specific changes that I've made.