I have been using xposed since I started using Android.
Never had any issue before.
Recently I upgraded from cm11 to cm12.1 (sdk22/arm) and I found a very serious problem.
My phone didn't took much time to do a reboot before (30-50secs)
But right after installing xposed framework by recovery, it taking so much time when rebooting.
(Like I flashed a new rom and this is 1st reboot).
U wont believe, it almost taking 8 minute to complete a usual reboot now.
I searched on FAQ and found nothing about it.
Samsung Galaxy Star GTS5282