In a similar example that is closer to the topic at hand, I recently had an issue where if I turned on a certain setting it would cause my ç key to become a ć instead, as an unwanted side-effect. Since everything on Linux is free and open source, I was able to find and read the source code that was responsible for my problem, which allowed me to figure out how to workaround the issue for now, and to file a bug report with the upstream developers.