Tag [gallery category="..."] is not working

I trying to show all images of one category by tag [gallery category="livingroom"] but plugin doesn’t work. I created several categories, added 10-90 images to each category, created new post with tag [gallery category="livingroom"], but post is empty. Tried to use standard tag [gallery columns="1" link="file" size="medium" ids="3548,3547"] – it works. Tried to deactivate all plugins except Media Library Categories but it doesn’t helped. I use Impreza theme and WordPress 4.7.3. What’s reason can be?