I'm not sure if this question should be posted here or on Meta SE. Perhaps the mods can guide me best on this.
I was going through the activity log of the Community User and noticed that it has accepted many answers. I checked on Meta SE for any info on this behaviour, and this post explains that when the OP of either the question or the accepted answer has their account deleted, then the ownership of the accept transfers to the Community User.
However, in this question both OP's are active, yet the accept belongs to the Community User (check the activity on Dec 14, 2016). Why is this? Does this have anything to do with the fact that the question was migrated from Music Practice and Theory SE?