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Originally posted by PiBiscuit

New Reroll-to- Bench Cooldown: Previously, if players rerolled their champion, then their previous champion could be picked by their teammates immediately. Now, your rerolled champion will have a three second “bench cooldown” for your teammates, meaning they will be unable to pick said champion and you can get them back without any stress. Goodbye bench sniping minigame! This change won't impact any of the existing swap-with-bench behavior as it focuses on rerolling, meaning if you swap with a bench champion, your teammate will still be able to pick the champion you gave up immediately.

FINALLY

Happy to help :D