Zyra plants becoming a non-sellable unit on your bench

Didn't get a picture of this happening, but in my last game I won a battle with Zyra's summoned plants on the board and bought a Qiyana off the roll before the battle resolved, and then the Zyra plant ported to my bench and became an non-sellable unit taking up one of my bench spaces for the entirety of the game. This was on live patch, and around stage 2-2. The plant would look as if I could sell it for 0g, but would not sell. I could try to put it out into battle but it would immediately come back to the bench when a new battle started. First time reporting a bug here, so forgive me if I missed something.