Guild Wars 2

On land the auto attack is locked on grenade kit, giving engineers a nasty case of RSI, and wearing out their keyboards, but under water is enabled, why ^-^?

because groundtargetting doesn’t work underwater ?

They changed something with Grenades back in the early parts of the game. I don’t recall what that is now. This may be it as whatever it was made Grenades underwater OP. Again, it was a long time ago and I may be remembering this wrong.