Closing inventory while cursor hovers over spell (or other magic menu item) produces left click sound
When I choose a spell in the magic menu (with left click), and then close all menus (with right click) while the cursor still hovers over a magic menu item, an additional left click sound is played.
This does not affect gameplay, as the click sound is played without another item being chosen, so your original choice stays intact.
For me, this always happens under the described circumstances. Which should actually be the most standard circumstances, as you'd actively have to move your cursor away from the menu you just performed a task in, before you close it, to avoid the additional clicking sound.
If other users can reproduce this, too, then I'll have a go at fixing it.