Hey there @Urainnnn! Welcome back to the community! If the enemies are Character or Pawn classes, they likely aren’t using physics at all when making these collisions, so mass doesn’t actually get factored in here. What’s happening is that the character you’re walking into are attempting to de-penetrate or step up on what is moving into it, which can cause launching.
Depending on your roll, you may need to set the movement to sweep which will stop you from continuing the roll into the target itself.