Issue regarding unwatched movies section

I am running Kodi17.1 and made some strange observation regarding the behaviour of the unwatched movies section.
If there is at least one unwatched movie, other movies will get added to the unwatched movie section when the watched status is toggled.
When marking all movies as watched, the unwatched movie section disappears. So far so good.
But when marking some movies as unwatched afterwards, nothing happens. The unwatched movie section won’t show up again and a reboot is required to bring it back.

When looking at the log files, I figured out that the following lines are missing in this case:

Code:
20:15:33.347 T:140152156371072   DEBUG: CDirectoryProvider[special://skin/playlists/unwatched_movies.xsp]: refreshing..
20:15:33.347 T:140152156371072   DEBUG: CDirectoryProvider[special://skin/playlists/random_movies.xsp]: refreshing..

Somehow the lists are skipped if they were empty and got filled again. The same issues applies to unwatched tv shows.

Anyone got an idea how to solve this issue ?