No, I didn't. The interesting part is that the tagged songs still appear under the supposedly-missing genre-node, so it's a problem with the validation feature itself.
Unless it has to do with encoding or line-endings or something, I'm stumped (without seeing how you've programmed that specific query). Capitalization has no effect and there are no extra/special characters.
Genre=00S, 2014, Abstract Hip Hop, Abstract Hip-Hop, Academy Award Winner, Adam Levine, Adult Alternative Pop, Adult Alternative Pop/Rock, Adult Alternative Rock, Adult Standards, African Traditional, Album Rock, Alt Rock, Alternative & Punk, Alternative 90Er, Alternative And Punk, Alternative Pop/Rock, Alternative/Indie Rock, Alternative/Rock/Folk/Metal, Ambient Breakbeat, Ambient Dub Techno, Ambient Pop, American, American Shoegaze, Américain, Australien, Beatgen, Billboard Hot 100, Binaural, Braindance, Britannique, British, British Folk, British Soundtrack, California Dreamin, Cast Recordings, Catchy As Hell, Chill Out, Chillhop, Christmas Classics, Cinematic, Classic, Classic Motown, Classic Pop And Rock, Classical/Piano, Club/Dance, Contemporary Country, Corsican Polyphony, Country Pop, Dance And Electronica, Dance Dub, Dance Instrumental, Dance-Pop, Death By Pneumonia, Down-Tempo, Downbeat, Downtempo, Lounge & Ambient, Downtempo/Trip-Hop/Ambient Chill/Beats, Drum And Bass, DubstepBass Music, Dutch Experimental Electronic, Dvdv, E-Gitarre, Early Pop, Electra, Electronic Dance, Electronic/House/Dance/Hardstyle/Jumpstyle, Electronic/House/Pop/Jazz, Electronica Dance, ElectronicBass Music, ElectronicDowntempo/Trip-Hop/Ambient Chill/Beats, Epicore, Escape Room, Experimental Hip Hop, Funk / Soul, Future Funk, Game, Game Music, General Downtempo, General Film Music, General Hip-Hop/Rap, General Indie Rock, Gesang, Glitchcore, Grave Wave, Harlem Renaissance, Hip Hop Rap, Hip-Hop Idm, Hip-Hop/R&B, Hip-Hop/Rap, Holiday, Hot Ac, Iceland, Indie Dream Pop, Indie Garage Rock, Indie Jazz, Indie Surf, Instrumental Hip Hop, Israel, Jazz/Big Band, Jungle Drum N Bass, Ladino, Long Title, Metropopolis, Microtonal, Modern Rap/Hip-Hop, Movie/TV Soundtrack, Old School Rap, Oldies/R&B/Soul, Original Film/TV Music, Other Rap Hip-Hop, Part Ii, Podcast, Pop / Rap, Pop And Chart, Pop/Others, Post-Modern Electronic Pop, Post-Teen Pop, Punjabi, Rap/Hip Hop, Rap/Hip-Hop, Rock And Indie, Scorecore, Sephardi, Shimmer Pop, Shimmer Psych, Synthwave / Electro, Traditional, Uk Contemporary R&B, Vapor Trap, Video Game Music, Video Game Soundtrack, Wantlist, West African, Western Hip-Hop/Rap, Western Pop, Wonky, Year End Chart
Genres=00S, 2014, Abstract, Abstract Hip Hop, Abstract Hip-Hop, Academy Award Winner, Acid, Acid House, Acid Jazz, Acoustic, Acoustic Rock, Adam Levine, Adult Alternative Pop, Adult Alternative Pop/Rock, Adult Alternative Rock, Adult Contemporary, Adult Standards, African Traditional, Afro-Cuban Jazz, Album Rock, Alt Rock, Alternative, Alternative & Punk, Alternative 90Er, Alternative And Punk, Alternative Dance, Alternative Hip-Hop, Alternative Pop/Rock, Alternative Punk, Alternative R&B, Alternative Rock, Alternative/Indie Rock, Alternative/Rock/Folk/Metal, Ambient, Ambient Breakbeat, Ambient Dub Techno, Ambient House, Ambient Music, Ambient Pop, Ambient Techno, American, American Shoegaze, Americana, Américain, Art Pop, Art Rock, Australien, Avantgarde, Baroque Pop, Bass, Bass Music, Beatgen, Bhangra, Billboard Hot 100, Binaural, Bluegrass, Blues, Blues Rock, Boom Bap, Bop, Bossa Nova, Braindance, Breakbeat, Breaks, Britannique, British, British Folk, British Soundtrack, California Dreamin, Cast Recordings, Catchy As Hell, Chamber Pop, Chill Out, Chillhop, Chillout, Chillwave, Christmas, Christmas Classics, Cinematic, Classic, Classic Motown, Classic Pop And Rock, Classic Rock, Classical, Classical/Piano, Club/Dance, Concerto, Conscious Hip Hop, Contemporary Country, Contemporary R&B, Cool Jazz, Corsican Polyphony, Country, Country Pop, Dance And Electronica, Dance Dub, Dance Instrumental, Dance-Pop, Death By Pneumonia, Deep House, Disco, Down-Tempo, Downbeat, Downtempo, Downtempo, Lounge & Ambient, Downtempo/Trip-Hop/Ambient Chill/Beats, Dream Pop, Drill And Bass, Drum And Bass, Dub, Dub Techno, Dubstep, DubstepBass Music, Dutch Experimental Electronic, Dvdv, E-Gitarre, Early Pop, East Coast Hip Hop, Easy Listening, Electra, Electro, Electro House, Electronic, Electronic Dance, Electronic Rock, Electronic/House/Dance/Hardstyle/Jumpstyle, Electronic/House/Pop/Jazz, Electronica, Electronica Dance, ElectronicBass Music, ElectronicDowntempo/Trip-Hop/Ambient Chill/Beats, Electropop, Epicore, Escape Room, Ethereal, Experimental, Experimental Hip Hop, Experimental Rock, Film Score, Flamenco, Folk, Folk Pop, Folk Rock, Funk / Soul, Future Funk, Future Jazz, Game, Game Music, Gangsta, Gangsta Rap, General Downtempo, General Film Music, General Hip-Hop/Rap, General Indie Rock, Gesang, Glitch, Glitchcore, Grave Wave, Hard Bop, Hard Rock, Hardcore Hip Hop, Harlem Renaissance, Hip Hop, Hip Hop Rap, Hip-Hop, Hip-Hop Idm, Hip-Hop/R&B, Hip-Hop/Rap, Holiday, Hot Ac, House, Iceland, IDM, Indie, Indie Dream Pop, Indie Folk, Indie Garage Rock, Indie Jazz, Indie Pop, Indie R&B, Indie Rock, Indie Surf, Indietronica, Instrumental, Instrumental Hip Hop, Israel, Jangle Pop, Jazz, Jazz Blues, Jazz Pop, Jazz Rap, Jazz/Big Band, Jazztronica, Jungle Drum N Bass, Ladino, Latin, Latin Jazz, Leftfield, Lo-Fi, Long Title, Lounge, Mainstream Rock, Math Rock, Metropopolis, Microtonal, Misc, Modern Rap/Hip-Hop, Movie/TV Soundtrack, Neo-Psychedelia, New Wave, Nu-disco, Old School Rap, Oldies, Oldies/R&B/Soul, Original Film/TV Music, Other Rap Hip-Hop, Part Ii, Podcast, Pop, Pop / Rap, Pop And Chart, Pop Punk, Pop Rap, Pop Rock, Pop/Others, Post-Modern Electronic Pop, Post-Teen Pop, Progressive House, Progressive Trance, Psychedelic, Psychedelic Pop, Psychedelic Rock, Punjabi, Punk, R&B, Rap, Rap/Hip Hop, Rap/Hip-Hop, Reggae, Rhythm And Blues, Rock, Rock And Indie, Score, Scorecore, Sephardi, Shimmer Pop, Shimmer Psych, Shoegaze, Soul, Soul Jazz, Soundtrack, Synth-Pop, Synthpop, Synthwave, Synthwave / Electro, Techno, Traditional, Trance, Tribal, Trip Hop, Trip-Hop, Uk Contemporary R&B, Underground Hip Hop, Urban, Vapor Trap, Vaporwave, Video Game Music, Video Game Soundtrack, Vocal, Wantlist, West African, Western Hip-Hop/Rap, Western Pop, Witch House, Wonky, World, Year End Chart