Image is too small, ... but I think I know what is issue
Replace content of your global.js with latest one:
https://stela.mb-themes.com/oc-content/themes/stela/js/global.js?v=122132132
I replaced the JS content and the error dissipated from the console, perhaps the error loading items from sub-values persists.
EX: on category page you choose "Show More Filters" to see those attributes for "vehĂcles category", then you select
make and a second sub-attribute shows up, so when you clic it it shows a list of
repeated items. you can figure out on my link.
For me is related to ajax or something, because it reloads something and bring you that list bugged.
Take into account:It works perfectly when posting a new ad. so I don't think it is related to attribute itself.
if you randomly clic any item on that bugged list it ends up refreshing that list with correct values.