I have only noticed it on my iPad and laptop, as I don't quest much on my phone. Basically when a quest completes, the whole screen will flash white and then the box will come up saying completed quest. It only flashes white for less than a second then goes back to the normal HEE page. I know it's coming, so I try and turn my iPad away from my face lol, especially at night when I should be sleeping but I'm questing LOL. I can screen record and send to you (Eve) if needed. I've been meaning to post this for ages, I just keep forgetting (totally not nearly 6am and I'm questing xD) lol

Adding in - I've just noticed it doesn't do it on the quest page (when delivering something I had to fetch) . It only happens outside of the quest page