User blog comment:Aphrodite Sweetheart/Official Winx Club WOW and 4th movie discussion blog/@comment-31892545-20171014161051

According to Una di Noi Winx, DuArt’s sister company, 3Beep, actually dubbed the second season of World of Winx. From what I’ve seen her discuss, 3Beep’s members are composed of those from DuArt, hence why the VA’s remained the same in the second season.

This dubbing change can be confirmed in the credits of WOW S2, if I remember correctly.