I know this location & know of this "bug".

It's possible to leave but it's pretty difficult. You'll end up standing on the edge of the terraformed ground immediately in front of the stone floor, then you can jump forward to continue out. I was able to use this exit technique without a cart & was able to repeat it with a cart by dropping the cart close to the edge of the stone floor, then using it after egress.

In any case it's an excercise in patience to get out of the area.

Let me attempt to comfirm that it's very difficult to egress from this area & clairfy what it takes (in addition to a healthy dose of patience) to gain egress.

If you walk or run to the edge of the stone floors, you'll be stopped by an invisible boundary. You can sprint & jump roughly to ( and only to) the area where the 2 stone floors meet. With luck & persistence you'll end up on the edge of the terraform just in fromt of the stone platforms. If you land there correctly you can jump and continue out...if not you'll have to try again, and again...and again. It's possible...but very difficult.

This bug is being worked along with the other invisible wall issue as they are related to the cliff of the pit below the platform.