QtPushbutton second button blocks release event of first button

I created two QTpushbutton buttons in two different instancesI use two Qt 5.19 QPushButton buttons (button 1 and button 2)

1. I hold down the button 1
2. I hold down the button 2
3. I release button 1
4. not released event emitted for button1 released

I aspect release event of button 1 emitted when I released it