It is unclear what happened but there appears to have been a breakdown between Fisher, manager and the club somewhere. The right back was out of contract in the summer and it is unclear whether they were ever close to agreeing a deal or if one was offered.
Preston have struggled at right back without Fisher. Browne has filled in recently whilst Rafferty seems below the standard required for Championship standard.
Fisher does have disciplinary problems but he was Neil's first signing and when fit he always seemed to be first choice. A deal was done to avoid the right back leaving for free in the summer and it will be interesting to see who the long term replacement is.