Act of Treason and support buffs

I had Sword of the Animist on board a Shield of Vigil (hope I got those names right) I used Act of Treason gaining control of my opponents creature. It gained the buffs from both supports. I attacked the creature returned to my opponents control after battle STILL BUFFED BY MY SWORD. I checked my opponent did not have a sword of his own on board and when he attacked the swords effects went off. Please address this bug in your next patch/update thank you