Spells: Bard AOE mez fail

[Gigafex]

Since the April 22nd patch my Bard's AOE mez (Kelin's Lucid Lullaby) song no longer works as it did before. Before the patch, a mob mezzed by my song would remain mezzed as long as I continued playing the song uninterrupted.

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As shown, a mob is now able to resist the song while they are mezzed (with a fairly high resist rate, as you can see 3 resists on a green mob), thus rendering the song nearly useless as a practical form of CC.

Edit:
"Venomous lamprey's head nods" is the spell message for mez landing.