Bug for Chinese Civ Great Wall Gatehouse that makes it disappear

I’ve seen a similar bug with this occur in previous posts on this forum from last year. However, the way the bug happened to me was a little different. I built the Great Wall Gatehouse on top of an existing gatehouse. After completing said landmark I decided to delete the old gatehouse that the now completed gatehouse was on top of. After deleting the old gatehouse, the Great Wall Gatehouse got demolished as well. However, I was unable to rebuild the Great Wall Gatehouse as it completely glitched and disappeared for me. First time I’ve encountered this bug but I am not too sure if others have experienced this recently so I thought I should raise the issue.

Haven’t seen this but have rebuilt a Great Wall only to find that the gate will no longer shut, just lets enemy Right through