Categories with no unread feeds still displaying

PLEASE READ THIS BEFORE POSTING: Read before posting / reporting bugs

Describe the problem you’re having:
When all of the feeds in a category are read, I would expect the category not to display. Even right clicking on the category and marking everything as read does not hide the category.

If possible include steps to reproduce the problem:
Ensure the feeds in a category have no unread items. Category should not display, but does.

tt-rss version (including git commit id):
v19.2 (84d43a1)

Platform (i.e. Linux distro, PHP, PostgreSQL, etc) versions:
Ubuntu 18.04.2 LTS (GNU/Linux 4.4.0-141-generic x86_64)
postgres (PostgreSQL) 9.5.14
PHP 7.0.32

Browser is Chrome 73

Please provide any additional information below:
No custom themes, no plugins

looks like a side effect of recent changes

https://git.tt-rss.org/fox/tt-rss/commit/d09aad7c80f32afc77db5877b468a7ad4c2caab5