Cursor bug when playing Darius

So I played Darius just now (30/06/15). I'm not sure how to reproduce it, however with very annoying frequency, the cursor just remains locked on a specific type (including its function). This is particularly annoying when it's stuck on movement commands. I press on a minion, it just moves to the minion (issues a move command, not attack) and I can just press the minion repeatedly and never auto atk him. It happens with champions too, I just danced around clicking furiously on the enemy champs while doing exactly nothing. The cursor is stuck on the regular hand icon, even when I mouse over enemies. I click on them and it just issues a move command under them instead of an attack command.