I know some people have mentioned it, and after hearing about it, I just HAD to try it.
After a couple of tries, I managed to get 'Everburn' off the devil commander during the last fight on the Nautiloid. Woohoo!
However, apparently, Everburn is REALLY hot stuff, because you can't sheathe it. You CAN however, switch to your bow weapon and then sheathe that.
Minor bug, not really game breaking, but I did find it amusing.