I have seen gem swapping irregularies of all kinds since the Unity transition. I figured this was on the radar so I said nothing. Today it went wack-o though so I thought I’d post.
EDIT: Maybe goes without saying but I would like to point out this happens in ALL game modes (explore, treasure, pvp, etc)
I searched around to see if others had reported this problem but couldn’t really see so I dashed off this quick video: