Clouds cast shadow completely doesn't work!

Clouds cast shadow completely doesn’t work !

I reported this months ago and this bug still exist. I see that it was reported by other people too.

Here is my original past post about this issue : Screen flickering during using high amount of clouds with shadows enabled - Get Help / Tech Support - D5 RENDER FORUM

After months I use completely new computer but this issue is still present so this is not hardware related.

Only way to resolve this issue is to restart D5.