Kvantum Themes Does Not Apply Blur or Transparency On Intel Integrated GPU [Optimus Manager]

Kvantum themes does not work properly with intel graphics drivers. But they work as expected with nvidia drivers. I am using optimus manager and optimus manager qt. When I select integrated graphics, the blur and transparency of windows does not apply. Selecting hybrid does the same. If only nvidia is selected, the themes apply correctly. Without optimus manager, the themes also does not apply. I have tried many themes. They all act like I described. I hope I was able to clarify my problem. What can I do to solve this problem?

Here is my neofetch:

OS: Manjaro Linux x86_64
Host: VivoBook_ASUSLaptop X531FL_S531FL 1.0
Kernel: 5.13.12-1-MANJARO
Uptime: 11 mins
Packages: 1537 (pacman), 6 (snap)
Shell: bash 5.1.8
Resolution: 1920x1080
DE: Plasma 5.22.4
WM: KWin
WM Theme: Orchis-dark
Theme: OrchisDark [Plasma], Fluent-round-dark [GTK2/3]
Icons: [Plasma], Tela-circle-dark [GTK2/3]
Terminal: konsole
Terminal Font: Noto Mono 10
CPU: Intel i7-8565U (8) @ 1.800GHz
GPU: Intel WhiskeyLake-U GT2 [UHD Graphics 620]
Memory: 2096MiB / 15856MiB

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File a bug with the maintainer of said themes.

For more information read this:

more specifically the What’s this Upstream/Downstream business?


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