I am not a Epic developer but I can pretty confidently say this is a known issue and it is up to the developer on how he/she wants to address it. Some games may want this (maybe player is a ghost or something). For others I think the best option would be to detect collision of the eyes and the world and then black out the screen. Pushing the player’s body away from the wall (so that the head is no longer moving into the wall) will probably cause sim sickness and that is always bad.