Was just testing around with the new dm cards and came to this gamestate.
activated Gaze of timaeus target Dark magician of destruction on Board trying to summon Dragoon (which should be possible) but could only summon Timaeus the United Magical Dragon
Probably gaze confuses the (Target 1 “Dark Magician” or “Dark Magician Girl”) part of the effect and thinks both cards names have to be on the monster you want to summon with an or between them instead of either 1 of them