Another activity -> Game activity error on android

Hello.

I am developing custom thirdparty login system like facebook.

When another actvity down after thirdparty login successfully, gameactivity is sometimes shutdown…

this is my logcat

D/UE4     ( 7375): [2016.04.07-01.16.03:092][  0]LogAndroid: Case APP_CMD_GAINED_FOCUS
D/UE4     ( 7375): [2016.04.07-01.16.03:092][  0]LogAndroid: Case APP_CMD_TERM_WINDOW
D/UE4     ( 7375): [2016.04.07-01.16.03:092][  0]LogAndroidEvents:Display: DequeueAppEvent : 11, 0
D/UE4     ( 7375): LogAndroidEvents: EnqueueAppEvent : 0, 2883183408
D/UE4     ( 7375): [2016.04.07-01.16.03:092][  0]LogAndroid: Case APP_CMD_INIT_WINDOW
D/UE4     ( 7375): [2016.04.07-01.16.03:092][  0]LogAndroidEvents:Display: ExecWindowCreated
D/UE4     ( 7375): ***** Window different, not using res cache
D/UE4     ( 7375): [2016.04.07-01.16.03:093][  0]LogAndroid: Requires 32BPP Encoding: YES
D/UE4     ( 7375): [2016.04.07-01.16.03:093][  0]LogAndroid: Requires Mosaic: no
D/UE4     ( 7375): [2016.04.07-01.16.03:093][  0]LogAndroid: Setting Width=-8 and Height=-8 (requested scale = 0.888889)
D/UE4     ( 7375): ***** WindowWidth is -8, not using res cache
D/UE4     ( 7375): [2016.04.07-01.16.03:094][  0]LogAndroid: Requires 32BPP Encoding: YES
D/UE4     ( 7375): [2016.04.07-01.16.03:094][  0]LogAndroid: Requires Mosaic: no
D/UE4     ( 7375): [2016.04.07-01.16.03:094][  0]LogAndroid: Setting Width=-8 and Height=-8 (requested scale = 0.888889)
D/UE4     ( 7375): Assertion failed: PImplData->eglSurface != EGL_NO_SURFACE [File:C:\Private\SVN\NextStage4104A\Engine\Source\Runtime\OpenGLDrv\Private\Android\AndroidEGL.cpp] [Line: 233]
D/UE4     ( 7375): eglCreateWindowSurface error : 0x3003
D/UE4     ( 7375): [2016.04.07-01.16.03:096][  0]Assertion failed: Assertion failed: PImplData->eglSurface != EGL_NO_SURFACE [File:C:\Private\SVN\NextStage4104A\Engine\Source\Runtime\OpenGLDrv\Private\Android\AndroidEGL.cpp] [Line: 233]
D/UE4     ( 7375): eglCreateWindowSurface error : 0x3000
D/UE4     ( 7375): OnAppCommandCB cmd: 8
D/UE4     ( 7375): LogAndroidEvents: EnqueueAppEvent : 2, 0
D/UE4     ( 7375): OnAppCommandCB cmd: 11
D/UE4     ( 7375): LogAndroidEvents: EnqueueAppEvent : 7, 0
D/UE4     ( 7375): App is running in Landscape
D/UE4     ( 7375): ==============> Resuming main init
D/UE4     ( 7375): ==============> GameActive.onResume complete!

I think that 10 th is problem.

and I saw post google play should be disable. but I should use google play…

please help me…