Lack of content

Content is missing in the side panel, I have a row of two, and despite the fact that both are seen in design mode, in the side panel, it is not displayed, it is necessary, and when I place any element within it, it still does not appear in the side panel !!! …

Apparently it is a problem that is never solved !! is very annoying

@Norm

Agreed.
It seems to happen quite often.