Wix dropdown display bug in preview

I am running into the same issue of dropdowns not populating in Preview mode. I have seen this behavior within the past hour (CST US). It seems to be directly related to setting the .selectedIndex attribute to any number (0 to length of the options array). If I comment out setting the selectedIndex, the dropdown populates. Does not matter if values come from a hard coded array, a collection, or the results of a function. If I publish the site with the selectedIndex set, it works as expected in Live.