Problem with rendering stereoscopic with build application (work fine with Unity editor play mode though)

Hi, I trying to develop VR application.

However, I have a trouble that stereo Image seems not rendered properly at built application. What can I do to solve it? I would appreciate any help/advice.

[Develop Environment] windows 10 64bit Unity 2020.3.21f personal

[What I'm doing] I wrote test code based on Unity script reference below. I add it to Main Camera as a component. It write stereo image file.

(Unity script reference)Camera.RenderToCubemap https://docs.unity3d.com/ja/current/ScriptReference/Camera.RenderToCubemap.html

Generated stereo images are fine when it is generated with Unity Editor mode.

However, they are not fine when I build as windows application (exe) and run it. Generated images are split in center but not work as Stereoscopic img.

I built windows application by default build setting setting for "PC, Mak & Standalone" and Windows as Target Platform and x86_64 as Architecture.