Landscape tool not working on some levels

Please see images before reading;

The area that I’m trying to make invisible:

Testing it on another Level:

I’m using UE 4.25.3. I was trying to use the visibility tool and it wasn’t working so I tested it on another Level with the exact same textures and it worked(see image for what it looked like). I couldn’t come up with any reason for it doing this, apart from maybe an effect from foliage, but I’ve checked the blueprints over and over again with them being the same and working on other levels. The landscape is not imported and is made within engine. The textures used are Megascans ones.