I always have 'Preview' turned off and when I get a new message notification it doesn't show the persons name but it does if I switch 'Preview' on, only seems to have started happening since the last update. Any ideas?
If you've only noticed it with the last update then I recommend you contact the developer and let the developer know so the possible glitch/bug that's causing the problem can be fixed.
It's not a fix but this was the solution: Go to WhatsApp > Settings > Notifications > turn Show Preview on. Go to iPhone Settings > Notifications > WhatsApp > Show Previews > Never