Why sometime i unable to see some list

I didn’t assign any role to any user, but still sometime my user unable to see list suddenly, while they are working.

I have seen this as well.

After working on something like a new Print Format, when I then go back to try to see the new format in the Print Format List I get an error indicating I do not have permissions to view the list.

To get around it for now, I click on my ID Icon in the upper right corner and then select “Reload” in order to flush the browser buffers and cache. I can then view the list again.

This appears to be a BUG in some of the DocTypes.