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p.s. just for the record: all my plugins have "backup download" link to google drive (which worked fine in this case) at the end of the plugin description.
i have no experience in using obs studio, but as far as i understand, you are saying about audio streams in general? if so, could you provide the publically available link to some music stream with lyrics, so i could test the plugin for streams?
not looking at the code, try to use lowercased <tab> or <cr><lf>. i'll look at this tomorrow.