Warlock Spells - Drain Life, Drain Mana, Drain Soul

Warlock Spells - Drain Life, Drain Mana, Drain Soul

All these spells have range issue, when you attemp to cast them at max range or 1-2yrd less from max range, they somehow stop the channeling immediately. For example Drain Life has 24yrd range, to able to channel it succesully you have to be in atleast 20yrd range from target.