Paper2D Sprites Getting Stuck

I’m completely new to Unreal Engine 4 and currently, I’m following the tutorials shared by Epic Games. Unfortunately, I have a serious issue that I’ve come across whilst following one of the tutorials.

[video]Paper2D: Creating an Alpha-Based Sprite | 03 | v4.4 Tutorial Series | Unreal Engine - YouTube

In this video at 12:50 you will see him setting the lock axis of the object. The UI in the video is outdated but I found out how to lock the axis via a forum post. It seems to work but when I add multiple platforms, they get stuck together and sometimes do not collide with the floor or walls if I psychically propel them in the view port during simulation. I’ll add a few screen shots showing the before and after - also the collision mesh and also the physics properties. Please, could someone tell me where I’m going wrong here.