Copied my bowling alley scene into new experience for some testing and strangely a wall is moved.
https://gyazo.com/f6e4b83ee7731323e766773ffaa43aca
Not a very good copy there.
Ok this is just weird, I did a build and visited it, the wall shows in the right place.
In experience:
https://gyazo.com/89f858fd05dcc3f155fde3f715b61cf4
In same experience Edit mode:
https://gyazo.com/deb172042d5e696191a5ff40f9fefd42