Help needed with Birdsnest Coral

[LegalReefer]

Hello! In need of help, my birdsnest coral has always been relatively hardy and healthy, but lesions appeared on it about two days ago and have grown on the branches. I’d love some advice/help as to what I should do. Pictures attached of the lesions/white area of dieback.

 

[ShaneAugust]

Any possible warfare going on next to it?

 

[LegalReefer]

Any possible warfare going on next to it?

Nope, it’s stretched out on its own. Nearest corals are some shrooms and a stylophora, but neither are close enough to the branches in question to be the cause