Thanks for the suggestion, I tried it this afternoon. I found out that the "Taskbar Jump Lists" deletes the Quick Access file list.
It's not necessarily intuitive and the explanation on the Piriform page doesn't give much more clarification.
https://www.piriform.com/docs/ccleaner/ccleaner-rules/windows-tab/windows-explorer-files
The relation I can find is when you right click on for instance the Excel icon, you see the most recent files at the top of the taskbar pop-up. This list is aggregated from all programs in Quick Access.