Strange shadow-artifacts while moving character U.E 5.3

Hey guys, Unreal n00b here.

So I just imported a new character and added a few animations via Mixamo. I’m just having a strange issue, that when I play the game and move around, these weird ‘shadow artifacts’ pop up sometimes where the character walked. Has anyone else experience anything like this?

Here’s a short video showing the problem:

Any help in this regard will be immensely appreciated.

Kind regards

mee too - you ever find an answer?