Attack Mode is Automatically Switching from Auto Attack to Free Attack

In order to prepare for R32 I started a new character in single player offline. As a new character I prefer auto attack. However I am constantly having to switch back to auto attack from free attack mode. It is very annoying
Reproduction Rate 100%
Windows 7, 64 bit, 16 ram
Steps to reproduce:
Character automatically switches from auto attack to free attack when:
Enter combat mode; despite having been in auto attack when exiting combat mode
Open a corpse's inventory window; you cannot loot without opening the corpse's inventory window

Mining, Forestry, Foraging, or opening a container do not cause the character to change attack modes.

It is very annoying to have to switch attack modes after every combat, especially since I strongly prefer to move by pressing the left and right mouse buttons (using the mouse to move is awkward and movement is often jerky and unresponsive.

 

Unchecked the Game Menu option of "Use Free Attack"?

Give that a try.

 

Still happens after disabling "Use Free Attack".