cursor appears when pressing shift with a QLineEdit

When selecting text in a QLineEdit and pressing the shift key the text cursor is shown.

The text cursor is shown for good until the selection is changed, delete the contents, or place the cursor.
The text cursor does not blink.
The problem is also noticable with a QComboBox.

Reproducible with the following steps:

• Create a QLineEdit, and show it.
• Type some text into it, select a part of the text.
• Press the shift key, and the text cursor will appear.