Summary layout issue

There is problem with summary layout at certain resolutions. On screen with resolution 1536×864, there is big space between widgets and columns are not the same width. When I decrease browser window width, layout gets fixed, widget columns are same. The same behaviour is also when I increase width and it also gets fixed. It looks there is some problem with css for certain width range into which 1536px belongs. Link to screenshot in Link field… There is no sense to show you web page url as for seeing the summary page you would need to be logged in. 🙂

The page I need help with: [log in to see the link]