You should be able to just refresh on a page and find it. Here's some custom CSS to make floating items show up in the top left corner, instead of randomly somewhere on the page.
.floating_item {border: 0px; position: absolute !important; left: 5px !important; top: 5px !important;}
sometimes, but not too often it takes a few days to find the bug. If your browser is quirky (for me, Safari does this) the bug and also random events are the last images on the page to resolve so if you are blasting your way through quests you may not notice it there.
Chamalma doesn't care if you find it find it or if you buy one and show it to her. If you're bored looking, this will give you a chance to catch another different bug the next day.