Recently updated my Samsung Galaxy s6 to Android 7.0 and am having trouble with my contacts in the Messages app. When looking at the list of conversations, contact names appear. When I open the conversation, the contact name disappears and I am only left with the person's phone number displayed at the top of my screen. I have read multiple forums on how to correct this, have restarted my phone, have force stopped the Messages app and the Contacts app, checked my settings in both apps and completely shut down my phone and turned the phone back on to no avail. Please assist.