So I started the final Network Tower mission with an 8 man squad and the squad bonus Individual Concealment, which is supposed to give each of my squad members concealment. At the start of the mission all squad members became Concealed all right, they all became Concealed 8 times (one per squad member).
I also went in with the buff that gives units Squadsight and they all received 8 copies of that ability as well.
I guess this isn't a bad bug because it still works as advertised, but it is interesting.
Screenshots:
http://imgur.com/a/xt3Qu