QDateTimeEdit tab focus not correct without separators

If the displayFormat is set to “HHmm ss” for a QTimeEdit, the tab focus is not working correctly. The attached example shows the issue with following steps:

• change focus from first line edit to time edit with tabulator -> hours are selected
• change the focus again with tabulator -> minutes are selected
• change the focus back with shift + tabulator -> hours are selected
• change the focus again with shift + tabulator -> the focus remains on hours, it should change the focus to first line edit