I just lost an RTS battle I could have won because a bug with unit selection. For some reason, my reticule turned into the "Dragon mode" reticule, even though I was in RTS mode, not Dragon mode (the Dragon was still on spawn cooldown timer), and I because my cursor was stuck in Dragon mode, I was unable to drag-select my units to give them orders, such as "stop moving and stay where you are, that's a lot of units about to intercept you".
That's a nasty bug.