I am creating a presentation for work using Impress. I have imported some photos. The images on the thumbnails “collapse,” making it impossible to look through them quickly or to use the slide sorter function. If I click on a thumbnail, the image on that slide takes a few seconds to open. If I repeatedly click on that image, the thumbnail will eventually open but collapses again as soon as I go to another slide. I am running LibreOffice on Windows 7.
I cannot reproduce it. Could you give it a try with new version of LibreOffice and if it still happens file a bug report at https://www.libreoffice.org/get-help/bug/
And of course paste a link here as well.