Quote Originally Posted by ChristianEhrlicher View Post
I would guess it's a regression in 5.13 - see https://bugreports.qt.io/browse/QTBUG-79806
yes, this seems to be the same regression bug. However, re-setting the minimum of each spinbox in the GUI seems impracticable. Fortunately, calling setStyleSheet (even in an void way) solved the problem for me. As for many applications setStyleSheet is called in a early stage anyway, most programmers won't see the bug.

Lin