Wow! I don't know. Sounds like a reset and reload might be in order. Conditional forwarding to GV should not cause any problems.
I'm checking in to see if you've seen any improvements with your phone? When you uninstalled, was this for Google Voice too or just the 3rd party messaging app? There should be a way to check the battery status and see which app is causing your phone to drain. Are you able to take a peek at that and see if that's helpful? If you've given the reset a shot, please give us a holler back and let us know if that resolved the problems. Thanks!
Just checking in here to see how things are going. Please let us know if you still need any help.
Hey there! How are things going? Did you still need help with this?