Briar Bug

Don't play Briar right now.

(I toggled the 'target champions only' key on and off multiple times, and tested it in practice tool to confirm.)

If the enemy champion dies while you're flying towards them after landing your ultimate, you become unable to attack anything at all — minions, jungle monsters, towers, everything. I think the issue is that Briar's ult frenzy is different from the normal frenzy; it's coded to chase that specific champion until they die, so this bug happens when the target dies mid-flight. Just a heads up for anyone playing Briar.