Using the designer for a widget application in Qt Creator, selecting an item in the list of widgets, drag and drop into the widget and moving widgets in the design is not working. The issue is not happening all the time.

• Selecting and therefore drag and drop is not doing anything
• Clicking and dragging a widget in the design will make the widget disappear and releasing the mouse will let it appear at the last position

The used Qt version is 5.15.1.