We were expecting this to happen, but even then it doesn't make it better. The shift to Unity 5 introduced another blocking bug that was deemed major enough to merit a hotfix.
We managed to fix some other less critical issues too.
BUGFIX
-Fixed bug that was breaking Copgore's fight and not allowing progress
-[morgankitten] Improve lifebar (clockwork lens) visuals
-Fixed HUD appearing briefly after level load
-Fixed issue when skipping dialogs
-Fixed misplaced asset on streets-2
-Fixed many audio errors on bosses
-[MJRMasqu3rade] HERBIE intro out of sync bug