tst_QQuickMenu::Material::subMenuDisabledMouse(non-cascading) fails on Ubuntu 20.04

 9363: ********* Start testing of tst_QQuickMenu *********
 FAIL!  : tst_QQuickMenu::Material::subMenuDisabledMouse(non-cascading) '!subMenuItem1->isHighlighted()' returned FALSE. ()
    Loc: [/home/qt/work/qt/qtquickcontrols2/tests/auto/qquickmenu/tst_qquickmenu.cpp(1206)]
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading)
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading,mirrored)
 Totals: 289 passed, 1 failed, 0 skipped, 0 blacklisted, 111340ms
 
 
 9668: ********* Start testing of tst_QQuickMenu *********
 FAIL!  : tst_QQuickMenu::Material::subMenuDisabledMouse(non-cascading) '!subMenuItem1->isHighlighted()' returned FALSE. ()
    Loc: [/home/qt/work/qt/qtquickcontrols2/tests/auto/qquickmenu/tst_qquickmenu.cpp(1206)]
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading)
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading,mirrored)
 Totals: 289 passed, 1 failed, 0 skipped, 0 blacklisted, 111928ms
 
 
 9973: ********* Start testing of tst_QQuickMenu *********
 FAIL!  : tst_QQuickMenu::Material::subMenuDisabledMouse(non-cascading) '!subMenuItem1->isHighlighted()' returned FALSE. ()
    Loc: [/home/qt/work/qt/qtquickcontrols2/tests/auto/qquickmenu/tst_qquickmenu.cpp(1206)]
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading)
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading,mirrored)
 Totals: 289 passed, 1 failed, 0 skipped, 0 blacklisted, 110704ms
 
 
 10278: ********* Start testing of tst_QQuickMenu *********
 FAIL!  : tst_QQuickMenu::Imagine::subMenuDisabledMouse(non-cascading) '!subMenuItem1->isHighlighted()' returned FALSE. ()
    Loc: [/home/qt/work/qt/qtquickcontrols2/tests/auto/qquickmenu/tst_qquickmenu.cpp(1206)]
 PASS   : tst_QQuickMenu::Imagine::subMenuKeyboard(cascading)
 PASS   : tst_QQuickMenu::Imagine::subMenuKeyboard(cascading,mirrored)
 FAIL!  : tst_QQuickMenu::Material::subMenuDisabledMouse(non-cascading) '!subMenuItem1->isHighlighted()' returned FALSE. ()
    Loc: [/home/qt/work/qt/qtquickcontrols2/tests/auto/qquickmenu/tst_qquickmenu.cpp(1206)]
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading)
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading,mirrored)
 Totals: 288 passed, 2 failed, 0 skipped, 0 blacklisted, 113562ms
 
 
 10584: ********* Start testing of tst_QQuickMenu *********
 FAIL!  : tst_QQuickMenu::Imagine::subMenuDisabledMouse(non-cascading) '!subMenuItem1->isHighlighted()' returned FALSE. ()
    Loc: [/home/qt/work/qt/qtquickcontrols2/tests/auto/qquickmenu/tst_qquickmenu.cpp(1206)]
 PASS   : tst_QQuickMenu::Imagine::subMenuKeyboard(cascading)
 PASS   : tst_QQuickMenu::Imagine::subMenuKeyboard(cascading,mirrored)
 FAIL!  : tst_QQuickMenu::Material::subMenuDisabledMouse(non-cascading) '!subMenuItem1->isHighlighted()' returned FALSE. ()
    Loc: [/home/qt/work/qt/qtquickcontrols2/tests/auto/qquickmenu/tst_qquickmenu.cpp(1206)]
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading)
 PASS   : tst_QQuickMenu::Material::subMenuKeyboard(cascading,mirrored)
 Totals: 288 passed, 2 failed, 0 skipped, 0 blacklisted, 112020ms