Hello. I have noticed this problem mainly in the moors. If I am stunned right as I use my coda it will wipe all ballads/anthems but it will not produce healing or damage and it will not persist. So when this happens, depending on what stance I am in, I lose a big heal or big damage which can make or break a fight. I bugged it but I wondered if anyone else has encountered this problem or has a solution for it.