Elise Spiderling going onto the bench + blocking a spot

Type of bug: In-Game The bug occured after I won a round waiting for everyone else to finish their combat rounds. I sold a unit on my bench with Force of Nature on them. That triggered a spiderling to transfer onto my bench (because I would have 6/5 units on my board) The spiderling was fully interactive , I could put it on my board (would take up a unit slot) I could change it around on my bench) but the game wouldn't let me sell it(despite showing me I can sell it for 0G)

This bug occured on Patch 9.14A with the updated elise on live servers EUW