I was definitely wrong with my guess to the cause of this bug in the original post; it has nothing to do with time between commits as far as I can tell. I literally cannot get this project to build correctly now regardless of timing - all new Alpha, Beta, and Release versions display this bug, which obviously makes the files unreadable by Wow.exe.
Edit: By the way, it was a clean, straightforward commit/push in the repo. Neither update had anything weird going on. The only thing that could be related is that they were updated fairly close together (~5 minutes apart), but that's very often the case with these sort of things (when a primary consumer of the library is the same author who created it).