Ind doc - images are not visible in containers because there are too small. In size 0 x 0 mm.
It happens just for no reason just 1 day all images in a single spread disappeared, but they are linked of course. Images are present in containers as 0mm x 0 mm size red point square (see picture). No action is possible with the object.
Does this happen in just one file, or in multiple files? If one file, there could be corruption in the file. Save it as an IDML and reopen in InDesign. If in multiple files, try restoring your InDesign preferences and caches:
Thanks! It happened before in this single file, but there were no issues because this glitch recover itself somehow after saving maybe. Now it just appeared and stay. I tried to copy-paste to the new spread but useless.
To solve this issue and return all pictures to previous places you need to select the container of a single lost image so you would have the boundary box selected and the lost image 0x0mm. Do not select "round circle". Then copy this boundary and paste it, just ctrl+C and ctrl+V after this you will have an empty boundary someplace on the page. Then ctrl+shift+alt+C to reveal and return the image in boundary borders in its previous scale. The image will appear somehow turned or upside down but you will have the previous state of the images in your spread so you don't need to transform it again only place it in previous places again.