No problems here on Win10.1803 with my specs(clean OS instal from 1709 just before 1809), then the usual needed OS tweaks.
For now I will have to use VLC, I tried various other 3rd party recorders and for some reason, none of them can record the Radeon Overlay, including the Windows 10 game bar recorder. Maybe some day in the future ReLive will be updated so it will be able to record it's own overlay in game. It can record the overlay in Desktop, just not in games I have tried. CGSO for example.