Newbie: Images are not appearing

Hello, forgive the beginner question but:

I have added images several times to the page and they have all worked. Now, the last 3-4 images won’t appear in the development window or in the preview.

I know they are there as I can click on them and the black frame appears, and I can double click and the edit box appears. In the edit box I can click on ‘See’ and a new tab opens, and there the picture will load - but not on the page.

I’ve Brought to Front, and that doesn’t help either, so they’re not hiding behind something else.

Where am I messing up?

Thanks!
Chris

Oh my goodness. Have you found a solution to this? I know I’m late haha.