Messages going blank
I was having a problem where my incoming iMessages were coming through as phone numbers instead of contact names. Custom group names were still shown. I signed out and back into my messages account and the contact names were showing in the app again but incoming alerts are still showing up as phone numbers.
Now today, when I click on a conversation within the app it just goes blank. Even if I have been talking to this person for a while, no messages are showing up anymore on my computer.
I need fixes for both problems, it seems like they're connected anyways.
Thanks!
MacBook Pro (13-inch Mid 2012), OS X Yosemite (10.10.4)