Rommy
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I just rewatched it again, both yours and the original. In the original, the effect plays out completely, but in the mod, it gets interrupted. No changes were made by you in c2m3d1, and in c2m4r1, only Redwood_Observatory was added.
I'm playing with your Fixs_3.1 mod, which includes Fixed animations for Agrael and Railag's buffs; maybe that's the issue?