The window is sometimes just a little too small for the text to fit, although there is a lot of space.

[aleksejrs]

Sometimes, the window takes about half the width of the screen, and not the whole height.
The area on the top-right does not have enough space for the numbers, which are hence not displayed.

If I drag the bottom-right corner to expand the window just a little (increasing width by a pointer width), the numbers appear.