Weird since causing it go from “Some specific opening” to “Opening” (when there’s potentially a different opening for every season of an anime, sometimes more) would seem to only add confusion. Maybe it’s a lazy optimization for people who don’t bother renaming files and it’s some convoluted file with CRC32 and everything in the filename?
Personally I’d consider this behavior (at least, without a way to disable it and ideally have it off by default on new installs and installs that haven’t triggered it yet) a bug, since it’s silently changing the metadata without any way to override it.
