tst_qquickwindow::touchEvent_propagation(hide item) fails randomly on Ubuntu 14.04

 agent:2016/06/08 00:18:37 build.go:267: [make check -j1] 900 1200
 /home/qt/work/qt/qtdeclarative/tests/auto/quick/qquickwindow/target_wrapper.sh  ./tst_qquickwindow touchEvent_propagation
 ********* Start testing of tst_qquickwindow *********
 Config: Using QtTest library 5.7.0, Qt 5.7.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 4.8.2)
 PASS   : tst_qquickwindow::initTestCase()
 PASS   : tst_qquickwindow::touchEvent_propagation(disable events)
 PASS   : tst_qquickwindow::touchEvent_propagation(disable item)
 FAIL!  : tst_qquickwindow::touchEvent_propagation(hide item) Compared values are not the same
    Actual   (middleItem->lastEvent.touchPoints[i].screenPos())                                                                                                              : QPointF(210,210)
    Expected (makeTouchData(QEvent::TouchBegin, window, Qt::TouchPointPressed, makeTouchPoint(middleItem, middleItem->mapFromItem(topItem, pos))).touchPoints[i].screenPos()): QPointF(210,238)
    Loc: [tst_qquickwindow.cpp(672)]
 PASS   : tst_qquickwindow::cleanupTestCase()
 Totals: 4 passed, 1 failed, 0 skipped, 0 blacklisted, 971ms
 ********* Finished testing of tst_qquickwindow *********
 make: *** [check] Error 1