Sorry for hijacking this htread, but I have a similar issue.
+I have a feed category with about 120 unread articles. I toggle headline grouping, but I am not sure if this matters or not.
+I click on the category on the left pane, and start clicking “ctrl+down” to scroll to read the articles.
+At some point ( I tried to figure it out, but can say exactly after how many articles I read) the page won’t scroll down with “ctrl+down”, so I have to scroll with down key alone.
TT-rss says it’s refreshing the content (or something similar), but was it does, is marking as read a bunch of articles, that were supposed to be shown between the last one I actually read, and the first unread it shows, which should not really be the first unread.
+Last time it happened, I had around 120 unread articles, I could scroll via ctrl+down untill 80 were unread, I scroled manually, and it jumped to 50 unread. The right pane is also refreshed, so I can not scroll up to go through the ones marked as unread.
+I hope it is somewhat related to this thread, otherwise let me know and I can open a new one.
+Please let me know if what I wrote is clear.
+By the way I am running f6e287df110b2046643551aaae70917c61b061c9 on shared hosting, PHP 7 and Mysql.