TableView extended selection cleared when selecting a range with keyboard outside of valid range

When you select a range of rows in a TableView with the keyboard, you do so by pressing shift+down or shift+up. When the bottom or top is reached but you keep pressing the key, the selection is cleared.

Example code

A simple TableView setup already shows the issue:

import QtQuick 2.2                          
import QtQuick.Controls 1.1 

TableView {
    width: 300 
    height: 300 
    focus: true

    model: [{text:'foo'}, {text:'bar'}, {text:'baz'}, {text:'meow'}]

    selectionMode: SelectionMode.ExtendedSelection

    TableViewColumn {
        width: 200 
        role: 'text'
        title: 'Text'
    }   
}

User input

The following two scenarios result in the same behavior.

• Select any row. Keep pressing shift+down, until you extended the selection to the last row. Then press shift+down again.
• Select any row. Keep pressing shift+up, until you extended the selection to the first row. Then press shift+up again.

Issue / Actual Behavior

• The selection is cleared as soon as the user navigates outside of the valid range.

Expected Behavior

• Nothing should happen (the selection should stay the same) when the user navigates outside of the valid range with shift being held down.
• Without shift, the last (first) row should be selected exclusively.

Notes

When the user presses the up (down) key after the first (second) scenario, the second last (second) row is selected; as if the last (first) row was still the current index, but not selected. This makes me believe that there is not a range check missing but rather the reaction to a failed range check is wrong (clear instead of no-op).

Possibly related: https://bugreports.qt-project.org/browse/QTBUG-38270