Why doesn't QtCreator save the QComboBox's currentText property?

Question

Qt

There are a bunch of comboboxes on the form. I wanted one of them to have the default element, for example, the third element from the list. I was in the design editor and changed the currentText property to the one I needed, everything was saved, I ran it many times, changed the code, etc. - worked.
But when I reload QtCreator, this property resets back to the first element of my ComboBox.
I know that you can manually change the currentText in main, but this will add extra code to the sources ...
How to fix this? What the hell?