The QT3D functionality cannot be used, and the program is stuck

QT3D simple-qml program is stuck.

Description: Start the compiled 3D-demo, the screen has no change, you can't see the 3D image, Ctrl+C can't terminate the program, and the program is stuck.

Used 3D program: the official sample program "simple-qml" comes with no modification.

QT display platform: Eglfs/eglfs_viv

Chip: imx6

Recurrence probability: must occur.

Stack information when the card dies (only these can be seen):

2 __pthread_cond_wait_common pthread_cond_wait.c 508 0x7ffff400c376

3 __pthread_cond_wait pthread_cond_wait.c 638 0x7ffff400c376

4 QWaitCondition::wait(QMutex *, QDeadlineTimer) 0x7ffff66ccd23

5 QFutureInterfaceBase::waitForFinished() 0x7ffff66ce8de