I have had the exact problem. Before this I thought of Line6 as far beyond the pack in technology. I have spent thousands (several various, including JTV, amps, pods, Stage series speakers, etc) and this is the first time that they seemed to be absolutely absent on an issue.
It is certainly past the 25th. Apple has released new software and equipment. I have been using Apple since 1984 and have never really experienced such an issue. All of my other apps and equipment are working excellently with iOS 9. Apple is not the culprit! Please, notify us when a fix is available and don't be silent if you don't have one!