I have two XT926s which I rooted on Kitkat (I unlocked #1 a while back with the exploit on 183.46.10, #2 had OTA 183.46.15 and was rooted with Peroxide and then unlocked just recently with Sunshine). Both are on stock 183.46.15 now and have been for a year or more. Both had lost root as of last week. #1 also seems to have had TWRP overwritten with stock recovery. I looked in #1 /system/etc/ and there were two renamed install-recovery.sh files and also one NOT renamed. I believe the two remnamed ones are the original and the one from the *.15 flash. It was no problem to re-root and reflash TWRP, but I'm curious what's going on here....is VZW or Moto messing with unlocked and rooted phones now, de-rooting and forcing stock recovery? There have been no OTA update notifications since rooting and my understanding is they would fail in any case. I had done a Ti-Backup on #1 a few months back and several other operations and still had root then. Strange doin's....
Cheers