System information (version)

• OpenCV => 4.5.3
• Operating System / Platform => openSUSE Tumbleweed
• Compiler => gcc 11.2

Steps to reproduce

Build OpenCV with Qt backend.

cmake .. -DBUILD_LIST=highgui -DWITH_QT=ON -DWITH_GTK=OFF -DHIGHGUI_ENABLE_PLUGINS=OFF

Run minimal program:

#include <opencv2/highgui.hpp>

int main()
{
    cv::Mat img(200, 200, CV_8UC1);
    cv::imshow("img", img);
    cv::waitKey(0);
}

Close the window though close button, waitKey() does not return.

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues,
  forum.opencv.org, Stack Overflow, etc and have not found solution
• I updated to latest OpenCV version and the issue is still there
• There is reproducer code and related data files: videos, images, onnx, etc