Custom Guard Icons Aren't Restored

[KirbyKid256]

I found this bug involving Custom Guards for Five Nights at Frickbear's 3. For whatever reason, all the assets are loaded in the directory except for the guard's icon. This happens with every Custom Guard mod I've tried, the one in the screenshot uses The Boss, Wario! (Playable Wario).

However, when I edit the same mod in G3M to use any Data File (I've tried data.win and an XDelta patch), the icon does load.

[KirbyKid256]

Update, so I discovered something else. The issue also seems to fix itself whenever there's an additional extra file used, such as a README file attached to the mod. So, I guess it's whenever the extra_files section in the mod config is used besides the "addons/" folder that the icon get properly imported to the game.