Sorry, you didn't quote me so I didn't see your question till now. The S7 problem was resolved by an OS update.
And how long was it before you got the OS update?
I am 95% sure I'm going to return my S8+ today after work. I don't want to wait for months waiting for this issue to be fixed. It has started rearranging my app's when it restarts, and in couple of cases has deleted apps from my home screen that were on the SD card. They still end up appearing in the app drawer but they are totally gone from the home screen. The first time it happened I thought maybe I had done something and took a couple off and just didn't remember why I did it. So i put them back on the home screen and after one of the restarts they had disappeared again.