On WoW Retail and Classic if I am clicking when inputting any other action (spell cast, walking, using item, etc) the other action gets missed or delayed. This happens with any mouse button and ONLY on WoW. I play League of Legends like butter.
For example, I am strafing to the right while clicking and let go of right strafe. My character will continue right for a step or two.
Standing still while clicking, if I try to jump for example, it will sometimes be delayed and on occasion be ignored altogether.
I have driven myself crazy with troubleshooting and googling. Please tell me someone knows the solution.