Qt app memory keeps growing with accessibility enabled

Problem Description:

Run the attached Qt demo (QAccessible_leak), then turn on the Narrator feature on the Windows platform, and observe that the memory of this process will continue to increase.

Reproduction Steps:

1. Run QAccessible_leak.
2. Open the perfmon tool, add the Private Bytes counter for this process.
3. Operate QAccessible_leak to make it gain focus.
4. Observe the memory change of this process (for 5 minutes), at this time the memory of this process does not change much.
   
5. Press the Ctrl+Windows+Enter key combination to turn on the Narrator feature.
6. Operate QAccessible_leak to make it gain focus.
7. Observe the memory change of this process (for 5 minutes), and find that the memory of this process continues to increase.
   
8. Press the Ctrl+Windows+Enter key combination to turn off the Narrator feature.
9. Operate QAccessible_leak to make it gain focus.
10. Observe the memory change of this process (for 5 minutes), and find that the memory of this process still continues to increase.