I have seen this posted a lot on the forums with no real working solution, I have had this problem even since after doing a complete wipe of my entire system and OS.
I currently have an RX 480 with driver version 18.2.3 installed
Here is a video of the issue in action:
https://www.youtube.com/watch?v=URVKs8BZcus
Please, can this be reported as a bug to AMD somehow as it seems to have been going on for years!