This might be caused due to the fixes we’ve introduced in 2.8.
We fixed quite a few building issues that were reported in the past by our players including inverted wedges.
Could you please provide us with a video or some screenshots of what you are seeing?
I have others, in Stormglass, but they are much harder to make out visually. As I said in my post, this is one of the very first pieces I ever placed, and in its current config cannot be removed and replaced without some pretty involved structural change.