tst_qqmltimer::restartWhenEventPosted() failed on msvc2019 developer build in CI

agent:2020/11/18 13:53:59 build.go:379: 81: Test timeout computed to be: 1500
agent:2020/11/18 13:53:59 build.go:379: 81: ********* Start testing of tst_qqmltimer *********
agent:2020/11/18 13:53:59 build.go:379: 81: Config: Using QtTest library 6.0.0, Qt 6.0.0 (x86_64-little_endian-llp64 shared (dynamic) release build; by MSVC 2019), windows 10
agent:2020/11/18 13:53:59 build.go:379: 81: PASS   : tst_qqmltimer::initTestCase()
agent:2020/11/18 13:53:59 build.go:379: 81: PASS   : tst_qqmltimer::notRepeating()
agent:2020/11/18 13:54:00 build.go:379: 81: PASS   : tst_qqmltimer::notRepeatingStart()
agent:2020/11/18 13:54:01 build.go:379: 81: QWARN  : tst_qqmltimer::repeat() QUnifiedTimer::stopAnimationDriver: driver is not running
agent:2020/11/18 13:54:01 build.go:379: 81: PASS   : tst_qqmltimer::repeat()
agent:2020/11/18 13:54:01 build.go:379: 81: PASS   : tst_qqmltimer::noTriggerIfNotRunning()
agent:2020/11/18 13:54:02 build.go:379: 81: PASS   : tst_qqmltimer::triggeredOnStart()
agent:2020/11/18 13:54:02 build.go:379: 81: PASS   : tst_qqmltimer::triggeredOnStartRepeat()
agent:2020/11/18 13:54:03 build.go:379: 81: PASS   : tst_qqmltimer::changeDuration()
agent:2020/11/18 13:54:07 build.go:379: 81: PASS   : tst_qqmltimer::restart()
agent:2020/11/18 13:54:08 build.go:379: 81: PASS   : tst_qqmltimer::restartFromTriggered()
agent:2020/11/18 13:54:09 build.go:379: 81: PASS   : tst_qqmltimer::runningFromTriggered()
agent:2020/11/18 13:54:09 build.go:379: 81: PASS   : tst_qqmltimer::parentProperty()
agent:2020/11/18 13:54:10 build.go:379: 81: PASS   : tst_qqmltimer::stopWhenEventPosted()
agent:2020/11/18 13:54:10 build.go:379: 81: FAIL!  : tst_qqmltimer::restartWhenEventPosted() Compared values are not the same
agent:2020/11/18 13:54:10 build.go:379: 81:    Actual   (helper.count): 1
agent:2020/11/18 13:54:10 build.go:379: 81:    Expected (0)           : 0
agent:2020/11/18 13:54:10 build.go:379: 81: \Users\qt\work\qt\qtdeclarative\tests\auto\qml\qqmltimer\tst_qqmltimer.cpp(449) : failure location
agent:2020/11/18 13:54:10 build.go:379: 81: PASS   : tst_qqmltimer::cleanupTestCase()
agent:2020/11/18 13:54:10 build.go:379: 81: Totals: 14 passed, 1 failed, 0 skipped, 0 blacklisted, 11475ms
agent:2020/11/18 13:54:10 build.go:379: 81: ********* Finished testing of tst_qqmltimer *********
agent:2020/11/18 13:54:10 build.go:379:       Test  #81: tst_qqmltimer .............................***Failed   11.54 sec
agent:2020/11/18 13:54:10 build.go:379: 99% tests passed, 1 tests failed out of 81