Memory leak in Qt Demo when dynamic create object

I got a feedback from customer, like the summary

so I do a test use the offical demo : Qt Quick 3D - Dynamic Model Creation Example

The result like below:

1、

2、

3、

please focus on the memory info. 

After creating many objects with a plus sign and then returning to 0 with a minus sign, the memory cannot return to its original state.
After repeating this process, there is a significant cumulative increase in memory.

I verified it using Qt 6.8.0 version, and I'm not sure if the same issue exists in other versions.
Additionally, if there are any fixes, please provide the specific version of the fix so that I can reply to the user.