Hopefully fixed for the next release.
When transferring an item from one list to the other (from 1 to 0 quantity), the highlight was supposed to deselect the item from the old list to prevent issues with using the Quantity feature, but it was also interrupting the rest code with a return line. I removed the return lines and it should now function as originally intended. This should have only affected the Trade (Storage) and Drop menus and mainly for lists with just one item, I think.