Link-Feed Posts skipped

Subscribed to the IndieNews feed ( IndieNews en ) , it is just a link feed , but passed validity on ‘myfeedsucks’.
When I am reading through posts in this category they are always skipped on the way forward but selected correctly on the back (oldest first / unread only).

Can someone else confirm please ?

tt-rss version (including git commit id):
c7c9c5fb0ab6b3d4ea3078865670d6c1dfe2ecac

Platform (i.e. Linux distro, PHP, PostgreSQL, etc) versions:
Debian 9.7 , PHP 7.0.33 , MariaDB 10.1.37