I just downloaded an image from 1Password.eu and viewed it in the app. The problem is, the back-arrow closes 1Password, so there's no way to go back from the image viewer (if that's the correct name for it).
You have to quit the app completely and restart it.
1Password Version: 7.0 Beta21
Extension Version: Not Provided
OS Version: Android 8.1, August sec. patch
Sync Type: 1Password.eu