After using the library I created for a document successfully, suddenly the items I drag onto a page land on the pasteboard of the page I previously dragged an item to. EG, I drag an item to page 24 then scroll down to the next spread and attempt to drag a (different) item onto page 26, but my screen jumps back to page 24 and the dragged item lands on the very edge of the pasteboard on that page. Previously dragged item is deselected, nothing active on the previous spread. V17.4, Mac platform. Thanks in anticipation!
Try resetting your preferences: The easiest way to reset everything is to delete the InDesign preferences: as soon as InDesign starts to boot hold down Shift, Alt, Ctrl (and Apple/Cmd if working on a Macintosh). A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog. Further info and instructions here if needed: https://helpx.adobe.com/in/indesign/kb/indesign-preferences-support-file-locations.html
If a document is not behaving well then try
Open the IDML in InDesign Save the file as a new InDesign file with a new name See if the issue persists.