This endpoint gives different results if parameter values have lower or upper case.

https://api.listenbrainz.org/1/lb-radio
 
https://api.listenbrainz.org/1/lb-radio/tags?tag=Soul&begin_percent=0&end_percent=50&count=50 (0 results)
 
https://api.listenbrainz.org/1/lb-radio/tags?tag=soul&begin_percent=0&end_percent=50&count=50 (ok)