QtWebEngine key handle leak on Windows 10\11

On Windows 10/11 there seems to be a uncontrollable Key Handle groth (posibly a leak) for HKLM\SYSTEM\ControlSet001\Control\Class

Reg entry.
Potential culprit is a Qt5WebEngine spawned thread with very low I/O Priority

Attached are minimal example to reproduce and also video clip with behaviour demonstration.
Steps to reproduce:
0. Prepare process monitoring software (in my case it's Process Explorer)
1. Start example
2. Constantly click on application icon in Windows task panel or cause constant switch of focus between example app window and other windows opened.
3. Observe handle count for example application.

AR:
Each application focus switch (from example app and back) raises opened handle key count by 3-10 or more.
Supplemental:
using logman event tracing i found out that keys are being opened by abovementioned  Qt5Webengine thread with Very Low I/O priority and higher (then similar threads) cycles count.