QSerialPort missing some data while the window's being maximized/minimize or resized

I'm using QSerialPort in order to communicate with MCU. I tried signal/slots method and with thread, the both have missed some data while the application window is being resized, maximized/minimized, even hold left mouse button on the windows' border, There is no method I did not try to solve this problem, I wrote your forum two days ago, but nobody could answer. Please try this, you will get the same problem. Thank you.