Is this a KDE bug or a Kvantum bug?

When I use Kvantum or the MS Windows 9x application style, the remaining space info is cut off in Dolphin. Is this a bug I should file with KDE or Kvantum?

Since the bug also occurs with the MS Windows 9x style I would say report to both as kvantum may also have to change some things to make this display correctly. (I haven’t used kvantum for quite a while but there are a lot of options available in it have you checked to see if any of these can help with it?)