This seems to be a regression from 5.15 to 6.2.

On Qt 6, when setting layer.enabled = false on a Rectangle, the whole Rectangle disappears instead of just the layering being disabled.

Two projects attached that toggle layer.enabled every 2 seconds:

• One showing the broken behavior on Qt 6.
• One showing how it worked on Qt 5.

This is particularly relevant since the Qt docs advise:

Layering can be convenient and useful for visual effects, but should in most cases be enabled for the duration of the effect and disabled afterwards.