Windows 10, RX480 4GB on latest AMD 18.8.2 Adrenalin Drivers
Short description of error
Blender hangs on switching shading mode, Cycles and Eevee in fullscreen or windowed.
Exact steps for others to reproduce the error
Open default blender, switch to LookDev or Rendered in fullscreen will lock up and hang, switch to window mode will do the same if in center of screen, move windowed blender to bottom right corner, will sometimes work normal.
Edit: Does the same above, but just lower the top of window 1 inch down and all works normal.