sometimes left click will attack nothing instead of moving the player

i have the default attack bound to left click with quarterstaff skills. even with a 1.6s attack speed quarterstaff and an attack speed support the attack time is STILL 0.49s which is awful.. but that's not the point of this bug report. the bug is sometimes when using left click to move, it will instead attack even if there are NO mobs to target nearby or under the cursor.. and no i am not accidentally holding shift or control. this has a number of times caused me to attack the air instead of moving my character so then i end up dying because of how overtuned damage is in this game. please look at why left-click sometimes tries to attack the air with auto-attack bound to it, instead of moving the player