Row numbers permanently compressed after resizing application window

In the Qt Quick Controls - Event Calendar example, the row numbers for each week in the calendar may become compressed when resizing the application window vertically. This happens when reaching a specific point in the application window height, and staying there until the entire calendar is shifted slightly to the left, pushing the row numbers all the way to the left of the application window. When this shift to the left has happened, the numbers have become permanently compressed.

If you make the application window so small vertically that you go beyond this threshold and do it fast enough, the shift to the left will not happen. The numbers will in this case not become permanently compressed, until you reach the threshold by making the application window larger again vertically and staying there until the shift to the left happens.

Steps to reproduce:

1. Resize the application window by making it smaller vertically, and do it slowly.
2. Stop resizing when you notice that the entire calendar has shifted a little to the left.
3. Resize the application window my making it larger vertically. Notice that the row numbers have become permanently compressed.
4. Close the application, and run it again.
5. Resize the application window by making it as small as possible vertically, and do it fast. Notice that a shift to the left does not happen if this is done fast enough.
6. Resize the application window my making it larger, and do it slowly.
7. Stop when you reach the threshold. Notice that the shift to the left happens, and that the row numbers become permanently compressed.

Expected behavior:

The row numbers should not become permanently compressed at all. Below is an image of the example application right after running it. This is the expected appearance.

Observed behavior:

The row numbers become permanently compressed when staying at the threshold described above until a shift to the left happens. Below is an image of the application window with the same size as in the image above, but with the row numbers permanently compressed.