Sub-Playlists - New content won’t get to the Player

There is a Layout with one Region which contains the Sub-Playlist Widget. To this widget I assigned a Playlist “A”. “A” consists of 2 Sub-Playlists (see screenshot). Each of them has its own Expiry Time.

When I decide to add new content/ change the Expiry Date to one of the Sub-Playlists or “A” itself, it does not affect the Layout/Content displayed by the Player. Sometimes it works if I check the Layout out and publish it again. But doing that all the time is not convenient at all.

Odd: If I view the Region (in Layout Editor without checking it out) the new content is displayed and the number of Items shown in the Playlist is correct. Somehow the new content won’t make it to the display.

I already tried this suggestion but without success. Furthermore I tried to reduce the Collect Interval in Display Profile Settings – but again without success.

I have Xibo V2.1.2 installed on Docker on Windows 10 with Player 2 R201.
I hope to hear from you - Hannes.