It is indeed stuck, and will need an intervention. Changes show you did an Unmerged match, which is no longer listed, so there is nothing we can do to fix this problem. If profiles are connected via an unmerged match or rejected match, removing that will usually fix this problem
eta: disregard my statement that there is nothing we can do to fix a stuck merge. The brain is slow to engage, but I just created a new rejected match and then removed it, thereby removing the stuck situation, and then merged them. All fixed.