I've noticed that if a mob hits me with a dot like Disease Cloud, Venom of the Snake, Strong Poison, any Disease/Poison dot really, it blocks any further lifetap dot recourses from Vampiric Curse and Vexing Mordinia from landing on me. It does not erase any instance of the recourse currently in my buff window when the disease or poison dot lands, but it does prevent the recourse from landing until the disease or poison dot wears off. The Bond of Death and Leach spell recourses seem to land as intended.
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