>made a wad that replaces the Hulshult remix with the Xeotroid cover music (https://youtu.be/IxQ65lYNbmI)
>both were made with .ogg files so i made a new wad and replaced the old one
>played an entire hub to make sure it worked correctly
>right after uploading i went and loaded a save file only to be met with a "The memory could not be read." crashlog
>starting a new game seems to work fine for some reason

Kex doesn't really like it when you try to mod it even a little bit, does it?