tst_mousearea_interop is flaky on OpenSUSE

********* Start testing of tst_MouseAreaInterop *********
agent:2021/08/20 08:05:59 build.go:391: 134: Config: Using QtTest library 6.2.0, Qt 6.2.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 9.3.1 20200406 [revision 6db837a5288ee3ca5ec504fbd5a765817e556ac2]), opensuse-leap 15.3
agent:2021/08/20 08:05:59 build.go:391: 134: PASS   : tst_MouseAreaInterop::initTestCase()
agent:2021/08/20 08:05:59 build.go:391: 134: PASS   : tst_MouseAreaInterop::dragHandlerInSiblingStealingGrabFromMouseAreaViaMouse()
agent:2021/08/20 08:05:59 build.go:391: 134: FAIL!  : tst_MouseAreaInterop::dragHandlerInSiblingStealingGrabFromMouseAreaViaTouch(allow stealing) 'dragStoleGrab > 1' returned FALSE. ()
agent:2021/08/20 08:05:59 build.go:391: 134:    Loc: [/home/qt/work/qt/qtdeclarative/tests/auto/quick/pointerhandlers/mousearea_interop/tst_mousearea_interop.cpp(170)]
agent:2021/08/20 08:05:59 build.go:391: 134: PASS   : tst_MouseAreaInterop::dragHandlerInSiblingStealingGrabFromMouseAreaViaTouch(prevent stealing)
agent:2021/08/20 08:06:00 build.go:391: 134: PASS   : tst_MouseAreaInterop::hoverHandlerDoesntHoverOnPress()
agent:2021/08/20 08:06:00 build.go:391: 134: PASS   : tst_MouseAreaInterop::cleanupTestCase()
agent:2021/08/20 08:06:00 build.go:391: 134: Totals: 5 passed, 1 failed, 0 skipped, 0 blacklisted, 602ms
agent:2021/08/20 08:06:00 build.go:391: 134: ********* Finished testing of tst_MouseAreaInterop *********