It seems to be an issue that the 5700 cards are having with Free-sync. I have a 5700 that experienced the same issues you're experiencing, but more pronounced in games like Battlefield V (menu). Apparently older Radeon cards also have had the same issue.
A lot of folks have been saying it's the monitor's free-sync, but I disagree. I've bee using my LG 34UM68-P with my 1080 GTX just fine until I started using my 5700 with it. The only way to really stop the tearing is to disable free-sync on both the GPU and on the monitor.