Lol TFT, Elise spider in champions slot, bug.

So I was playing TFT with Elise when I realized her little spiderling got stuck in champions slot. I couldn't sell her and she took 1 spare slot. You might what to see into that. I also added gyazo screenshot link.

It was a ranked game in EU NORD/EAST region. I got this issue only 1 time, not sure how to reproduce it.