Unable to ban in champ select

[CLIENT] - Unable to ban Zyra (perhaps other champions as well)

I was in champion select in a normal draft and I was unable to ban a champion. I selected Zyra to ban, but an dialog box appeared saying the selected champion was already banned, which was clearly not the case. I was unable to take a screenshot because I was quickly trying to ban another champion but I ran out of time, and ended up unintentionally dodging. This was the first time it ever happened to me.

*Edit - Discovered that double clicking on a champion causes the dialog box to pop up. Closing the box and clicking the Ban button successfully banned the champion.