AMD's new Crimson Edition driver has glitched the compass display in Fallout 4, causing it to flicker, making it very difficult to know where you're going at a glance, or at the very least, annoying.
Fortunately, there's a fix available on Nexus Mods which removes the need to roll back drivers should you wish to fix the issue. The fix works by utilizing the .dll files from the previous driver while keeping the current driver intact.
The download is at the source. After grabbing it, extract the 32-bit OR 64-bit files to the folder where Fallout4.exe is located, then launch the game. Reverting should be as simple as deleting the same files. As always, use at your own risk.