I got stuck with an enemy unit on my board somehow on live tft

I didn't think to screenshot this cause i was in ranked but after the first carousal i picked a zed with a recurve bow. I played with it for about a couple rounds and decided to sell it for the item. I got gold for selling it but it then moved to my bench with the red health bar. It wouldn't let me sell it at all and I was stuck with it. Since it wouldn't let me drag it at all I leveled up and moved it to the right of my bench to see if it was still an active unit. It played but started attacking my own units. I have no idea how this happen and hopefully this can be looked at. Again sorry there was no pictures my dumbass forgot. If any rioters have questions please ask!