Hello,
First of all, sorry that it was so quite here all that time and you didn’t get any kind of response about dynamic shadow artifacts.
Thanks Kalle-H for your awesome contributions. I just integrated both of them (pcf 2x2 offset fix and pcf 2x2/3x3 optimization) for 4.20. Regarding other dynamic shadow issues in this thread - can’t promise anything at the moment, but certainly we will look into it.