I just added "Symphonic & Opera Metal Vol. 2" to my playlist as I encountered a strange bug wit the title "Heart Of A Warrior" by Freedom Call. The end of the song, from ~2:48, is played fast, like very fast (2x or faster). Then it starts a stuttering version of the next song, "Sing To Me", before the next song really starts with no problems.
The song "Crossroads" by Imperia suffers the same problem but this time it starts around 1:03.