Secondary character data corrupted.

Basically my main character ran fine for the whole duration of the final stormblood battle and many hours afterwards when I was preparing for transferring to a different database after I finished that I went to do the same with my secondary character and the game app got corrupted after running around a few minutes after using them. So I deleted all the data related to that character so I should be good now but I wanted to report on this with the hope it doesn't happen again.