Performance is degraded on every mouse-click or change (exactly 13 seconds between each one). I can ping our shared drive with no loss of data or delays. I can open the linked files from INDD quickly in the native app (PS or Illus).
If I disable Preflight everything works as it should with no delays at all.
Any ideas on a fix for this? I guess for now I can enable Preflight right before exporting (if I remember).
Try turning each option off one by one to see where the preflight is slowing it down.
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.
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