I'm not sure if you guys are having this issue. But sometimes when I put my PC on sleep, my GPU clock speed remains fixed at 300Mhz which is not very convenient.
I have removed my overclock profile from WattMan and clean installed the drivers back to 17.7.2 but the issue is still there.
Here, I can't even change the clock speeds when the problem occurs:
Restart seems to fix the problem for the main time.