My camera image is not displayed on the meeting screen

We are using Zoom SDK to create android app to start and join Zoom meetings.

About my app, there is a problem that my camera image does not display.
My own camera image is not displayed on my meeting screen , but participants in another location can see my camera images.

Occurrence Procedure:

1. Start (join) a Zoom meeting from my app
	At that time, the camera image is displayed.

2. Finish the meeting

3. Start a meeting again.
	At that time, the camera image is "not" displayed.

From this, the camera image is displayed in the first meeting immediately after installing the app, but the camera image is not displayed from the second meeting.

Clearing the app’s cache(Android settings) will allow the camera image to be displayed, and the camera image will not be displayed again at the second meeting.

We had this probrem with v5.11.10.8019, but never seen it in previous versions.
Can you think of any possible causes?

Which Mobile Meeting SDK version?
Android Meeting SDK 5.11.10.8019

Devices:
Device: Our company products
OS: Android 8