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Testing the SDK2.1 for opengl on Android, cannot show the model when restart the glsurfaceview

When I testing the SDK2.1 for opengl on Android, the model cannot be drew on the GLSurfaceView, only shows the white board.
Another issus: the device memory keep increasing when I restart the surface activity, the Android Profiler shows the memory leaks

what should I pay attention to?

ps: I use the demo code in "Live2D_SDK_OpenGL_2.0.10_1_jp".
os: Android 6.0 & 7.1
device: samsung J7 prime , xiaomi mix2 , pixel
operation: APP shows, then I press the back button, press the menu button to reshow the app, the app gives me a white board.

please tell me how can I fix it?