Incorrect spinboxes height with Qt 6.8.1 if application stylesheet present

[AlienCowEatCake]

Hello!
I found that all spinboxes was squashed after Qt 6.8.1 update. It reproduces only if application has stylesheet even if it is empty. Height was correct with Qt 6.8.0. Breaking commit in qtbase is 168f4aee268186f12f081ba962c6a25521556018 (QTBUG-130642).
I'm not sure that it is qt6gtk2 bug, but I can't reproduce it with other styles. Maybe something is wrong in QGtkStyle::sizeFromContents

Sample code:

#include <QApplication>
#include <QInputDialog>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    a.setStyleSheet(" ");
    QInputDialog::getInt(nullptr, "t", "l");
    return 0;
}

Qt 6.8.0 result:

Qt 6.8.1 result: