The card states disable an opposing card but it disabled my first creature. I had three creatures at the time and opponent had none. Not sure if they had supports. I just realized after posting this that I might have to provide some more details but there is definitely a bug because it should not be disabling one of my cards.
Hello @Larz70 ,
Thank you for all the information provided, this issue will be investigated!
If you have any additional information that you consider relevant, please don’t hesitate to send me 
Rebeca