not sure if that's what you describe but there is a bug with guy summer and mabui kimono (basically ppl that make 0 chakra myst) in arena and automated fights, when they use myst on someone even if the targets c*e the mysteries they will not unless you have the required chakra, for example if guy mysteries LM to use his 40chakra mystery without chakra, the auto-system won't trigger LM's mystery unless you have 40 chakra, regardless of the fact that now LM's myst is 0 chakra