Been running 5.1.1 on my LG Volt for about two months now. The only I have found so far are:
-Sometimes the device randomly reboots
-App tray sometimes freezes, holding home button and clearing all recent apps usually fixes the problem
-The 4G LTE APN fix sometimes fails and you have no 4G, but going into the settings and re-selecting your APN fixes it
-NFC doesn't appear to work
-Can't get voicemail notification to go away, always says I have one, haven't figured out a fix for it yet. If you clear the notification, any loss of service or restarting the phone will make the notification appear again.
-Lockscreen shortcuts will sometimes disappear, reset or the icon will change but still be the app you chose. Mostly found this happened with Facebook Messenger app, haven't tested it with any other apps besides stock messaging and camera app, which do not reset, etc.
-Stock camera flash is a little weird, it goes off but not when the pciture is taken, making it useless
-Keyboard sometimes won't come up, this happened when I had the stock OS for this phone, I use the Android AOSP keyboard, can't say if this issue happens with the other keyboards or not
-Stock messaging app and camera work just fine, same with all other features unless listed above. Turned on lift to wake and that fixed the screen turning on and off issues. No issues with deep sleep. Screenshots, etc work nice. Had to download QuickPic, just didn't like Google Photos app for my gallery. Once you have the APN Fix, MMS works. Below are also some pictures of everything.
Any feedback on any of these issues would be wonderful, and this ROM is amazing so far, runs SO much better than the stock for this phone. Thank you!
(Rooted Virgin Mobile LG Volt, CM 12.1 Android 5.1.1, TWRP, SELinuxModeChanger on permissive, SuperSU, Virign Mobile APN Fixer)