I never got this to work since it came out, the output file is correct, but the overlay doesn't show anything, also, the little square overlay doesn't show at all.
What i tried:
Default ReLive Settings
Closing all background programs
Clean install of the driver (with AMD CleanUp Utility and DDU)
New Windows install on another drive
GameDVR & Game Mode are disabled.
Infos about my system:
This feature works perfectly on my second system with a R9 280X.
Update about this:
I tried again this "Ingame replay" feature in a fresh new Windows install, it still breaks when i use HEVC but works when i use AVC, on my main Windows install it doesn't work even when using AVC.
Looks like ReLive has a lot of issues right now, if anyone is interrested, you should take a look at the Windows 10 Game DVR, it is MUCH more reliable (in fact i never had ANY problems with it) than ReLive.