I've long been puzzled by htis. If you look at the Replace Quick Action Fields avaliable in the Feild drop down you will se %ARTIST% and ARTIST listed. Empirically I've the experience that ARTIST works and %ARTIST% remains a mystery. On the off chance this isn't what you see, I offer an image of what I see attached.
My question is, what is the difference between these three seemingly arbitrary top % bounded tags and the rest of the list? Is it something peculiar to my local configuration and something I did and forgot or does everyone see this?