-bug- enemy morgana on my bench, cannot sell (clip + screenshots included)

Included find a clip from playstv on how this happened plus two screenshots

COuld not sell the champion Could put it on the field but the moment she entered battle, she despawned and a random guy from my bench was put into place

https://imgur.com/a/nsgGzYP https://plays.tv/video/5d36000067583938ce/enemy-morgana-bug