Streets flickering in rainbow colors and trees looking funky

I have this weird issue that whenever i start a race there are these texture glitches popping up.

They started to appear since the 17.10.1 AMD driver updates and continue until this date.

Furthermore since then loading into Forza Horizon 3 takes about 5 minutes as well as having texture glitches.

If I use 17.9.3 driver version I do not have these issues.

My system:

Asrock Z77 Extreme 4 Bios ver. 2.90
Intel i5 3570k
12gb Corsair Vengeance LP ddr3 ram
AMD Vega 56

I just wanted to make people aware of this issue and maybe get some help or workaround besides using outdated drivers :x