Disappearing links

I have a weird problem and need some help. So, I have a prototype with ~20 text ‘cards’ which are instances of a component with 2 variants. Variant 2 shows a text field which contains a link or a list of links (max. 4). Of the more than 20 cards in my layout, there are 3 that do not show the link(s), only text in the preview. So, in the editor, I see the links, in the preview, they are gone, so what the preview shows, does not even exist in the editor. How is that possible… what is going on? Has anyone ever experienced something like this or has an idea what might be the reason behind this behavior?

Thanks for any help!