Awkward CSS upon first load

I’ve setup the product table to include a dropdown filter for categories above the columns. However, when the page initially loads, extra padding is added to the dropdown causing the field to overlap headings and misaligned text with their corresponding radio dials (possibly getting overwritten by my theme)? However, when I select any of the dropdown options, the plug-in reloads with all usual spacing and the error goes away. What do I need to change so that the first time loading the page does not cause the dropdown to load weirdly?