Fill QTableWidget and refresh it with button

[Doppelganger]

I have push button that connect with this slot

ui.tableWidget->clear();
  ui.tableWidget->setRowCount(0);
  ui.tableWidget->setColumnCount(0);
  filltable();

ui.tableWidget->clear();
  ui.tableWidget->setRowCount(0);
  ui.tableWidget->setColumnCount(0);
  filltable();

To copy to clipboard, switch view to plain text mode 

Where filltable is function to populate QTableWidget. First populate in window is perfect. But when I push button, clear data and try repopulate table this is what i get : First populate - ok CzIWxUt.png after press pushButton aBEoLd7.png it's shift images. i don't understand why