Sierra Messages Problem
After upgrading to Sierra my messages app (which uses gchat, aim, and my phone number) is now not properly displaying the incoming messages. If I mouse over the blank spaces the message flashes so I know I'm receiving it, it's just not displaying properly. This was not a problem until I updated Sierra. Any insight on how to fix would be majorly helpful.
MacBook Air (13-inch Mid 2012), macOS Sierra (10.12)