I'm have the same contacts issue that the OP is mentioning along with additional bugs and related issues. Also noticed if you in a low coverage area, or generally semi sketchy service, the phone will from time to time drain faster then normal CDMA drain. Also as an added bonus until you go into an area of reasonable service our EVO LTE will boot loop constantly until its powered enough or in reasonable service zone. And hard resets don't fix it, making me and other's ive seen on the site believe that horrible ringtone fix they pushed out back near the end of September is the cause of most issues we are all having. It was bad enough they pulled the fix because of the issues it was causing, as if you look on HTC site for the fix it doesn't exist. I do not know why Sprint isn't commenting or making it a priority to fix these issues.
Sprint has to know about it but the tech support i contacted really had no idea but I'll try again soon and make the mention of this problem. I've already contacted HTC and they know about the issues but there's no ETA on an emergency fix. Honestly its just making my phone worst and worst even after three separate hard resets. The Facebook disconnect from sync after syncing the contacts once will make the lag go away a bit but it still creeps up from time to time. If anyone of higher standing can do so, can anyone get a hold of Sprint or HTC and find out when they will at least fix this signal/contacts bug.