We have a slightly odd problem on one of the solutions we look after running 11.20.16
After the client copys a page the blocks copied from the original 'For this page' folder cannot be found in the Assets pane. We are able to see that the have copied, and they're in the content areas on the copied page and can be edited from there. We can also confirm they are copies as we can see the IDs have changed from the original page and they have their own version history starting from the copy - but they do not show in the 'For this page' folder on the newly copied page.
Has anyone encountered this behaviour before or have any advice on identifying the issue and resolving it?
The problem was noticed as the client was wanting to copy an existing page to use a template for a new page they were working on, then after they did this they were looking to copy one of the blocks - but without it showing in the asset panel there is no easy way for an editor to copy the block.
Ive had this issue occur to me previously and the quick fix was to goto Website Settings in Admin mode, de-select site specific assets save then re-enable and save. It's not a long term solution but worth a try