My Yoda stole it and passed it and stacked it with my Lumi HoT. It only showed one icon, but I saw 2 heal ticks, and the buff lasted 2 turns. IMHO it is bugged, but only when stacking, and its a bug in our favor. DEVS!!! Please do not make changes to HoT Leader Abilities!
Random is random... You are implying a secret code that screws you over, which would be an unfair business practice... Not likely that EA knowingly exposes themself to prosecution and lawsuits...