Recently I've been creating new links in my document from my spreadsheet. After several copy and pastes, I notice the defaults I selected from the clipboard (either paste values only, or create links and copy formatting) don't always stick as I set them. It's always during the same session within minutes after setting the default that it reverts back to a different setting. I usually have to re-"set options as default." It happens when pasting in documents and spreadsheets. This is something happening frequently in Next Generation that I never had a problem with in Classic.