hello. when i drag items into the header buider, the preview does not show them. and the changes do not reflect on the published site. the header is empty regardless what i drag into it. i tried copying and choosing a differant header in the multiple headers and nothing happens. when i click on the multiple headers icon, it gets frozen and takes about 12 minutes to load. it sometimes shows some of the selected widgets. but when i publish it shows me a differant older header that as already erased
