In reading the S3 forums, where they apparently also can have the same issue, the solution is to go to Settings, Apps, swipe to ALL, scroll down to Contacts and select it (not Contacts Storage), then Clear Cache and Clear Data, exit and reboot. Have not tried this myself on the G2.
Klotar -- Supervising Manager,
The Department of Redundancy Department
LG Optimus G2 D-803 | Android 4.4.2 | Rogers Wireless