I've never had my SMS settings to where I'll get a preview of the text in the notification, I've always just kept it to where only the name pops up. I've noticed that with Beta 2, sometimes my text notifications will show the preview, and sometimes it won't. I went to the settings, and I didn't even see a setting now for "Show Preview" like there used to be. Anyways, it's just kinda weird how it does it every now and then ...