I am having issues with my grip. I have used it quite a bit and it has worked just fine until recently. During a wedding the battery indicator was flashing showing both my batteries were almost dead. I found it strange since I had only been shooting for about 3 hours and normally they last me all day. Later after I charged both batteries it did it again with fresh batteries. Going into the menu to battery info it said they were both at 100% even with the indicator flashing that they were about to go dead. Sometimes it will show a message that the camera cannot communicate with the batteries. After pulling out batteries and disconnecting the grip and putting everything back together it usually works fine for a while. Do you think the grip is going bad or there is a connection issue?