Shadow disappears in the middle on Android ES3.1

Development Platform & Builds Mobile
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1

I placed several animated characters in a simple level with only one DirectionalLight.
DirectionalLight’s Mobility is Stationary with Cast Modulated Shadows enabled.
The shadow head of the running character disappears in the middle.
This phenomenon also occurs on Android devices.

If you know a solution, please help.

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Thank you

2

When I changed the Mobility of DirectionalLight from Stationary to Movable, it was displayed correctly in the preview. Why? :thinking: