Based mostly on Jeremy Crawford’s tweet, if a goal is below the impact of an ongoing spell, after which the goal adjustments such that it’s now not a sound goal, the spell now not results them.
However does the spell finish, or is it merely suppressed?
For instance, suppose a human has been charmed by a dominate particular person spell. A pleasant wizard casts polymorph on them; they fail their save and get became a sheep. This makes their sort change to Beast, which is an invalid goal for the dominate particular person spell, and the allure impact ends. The following flip, the wizard chooses to not focus, so polymorph ends and the goal pops again into human type.
Assuming the dominating caster has maintained their focus (if potential), did the spell merely finish when the goal grew to become invalid, or does being invalid simply suppress the dominate spell, which reasserts itself as soon as the goal is as soon as extra legitimate, like it could in an antimagic area?