Unexpected behaviour of Animators on MacOS

Hi Qt,

The example "Qt Quick Examples - Animation" does not render Animators correctly. 
See the attached Video. 

Confirmed on MacOS Intel and MacOS M series running an Intel binary with Rosetta.

The issue does not occur on Windows.

We encountered this issue when investigating the root cause of https://bugreports.qt.io/browse/QTBUG-114721

The Metal layer periodically becomes blocked for an excessive time waiting for the next drawable to become free, causing disruption to the VSync cycle.

We believe QTBUG-114721 is the root cause of the issue as the Animators operate directly on the scene graph and can add sync events to the render thread queue when the UI thread is blocked which makes the problem more visible.