WebView automatically reload( Android version 6.0.1)

Hello,
I found the problem on the Android version 6.0.1 with WebView, I tested it on the other android versions and it's works fine.
In my case I show a sample web page, and it load it well, but for no reason it automatically reload it.
I use AndroidStudio to see the log and I detected that after the page is shown it triggered OnPause and after that OnResume. So, for no reason only on the version 6.0.1 it restart Activity automatically and give me a Toast with the message "Cannot display the PDF (573.36 cannot be opened)"

(Filename: C Line: 0)

03-18 16:43:25.205 29657-29687/com.softatec.TheRoseKing I/Unity: CallFromJS[ua=Mozilla/5.0 (Linux; Android 6.0.1; SM-T800 Build/MMB29K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/73.0.3683.75 Safari/537.36]
UnityEngine.DebugLogHandler:Internal_Log(LogType, String, Object)
UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
UnityEngine.Logger:Log(LogType, Object)
UnityEngine.Debug:Log(Object)
c__Iterator0:<>m__0(String)
WebViewObject:CallFromJS(String) (at C:\Users\Mirsad\Documents\projects\the-rose-king\Assets\Scripts\MoreGames\WebViewObject.cs:684)

(Filename: C Line: 0)

03-18 16:43:25.205 29657-29687/com.softatec.TheRoseKing I/Unity: Open url: ua=Mozilla/5.0 (Linux; Android 6.0.1; SM-T800 Build/MMB29K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/73.0.3683.75 Safari/537.36
UnityEngine.DebugLogHandler:Internal_Log(LogType, String, Object)
UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
UnityEngine.Logger:Log(LogType, Object)
UnityEngine.Debug:Log(Object)
c__Iterator0:<>m__0(String) (at C:\Users\Mirsad\Documents\projects\the-rose-king\Assets\Scripts\MoreGames\WebViewHandler.cs:64)
WebViewObject:CallFromJS(String) (at C:\Users\Mirsad\Documents\projects\the-rose-king\Assets\Scripts\MoreGames\WebViewObject.cs:684)

(Filename: C Line: 0)

03-18 16:43:25.405 29657-29657/com.softatec.TheRoseKing I/Unity: onPause
03-18 16:43:25.435 29657-29748/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-18 16:43:25.435 29657-29748/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-18 16:43:25.500 29657-29687/com.softatec.TheRoseKing I/sensor: ASensor_disable: handle:0, name:BMI055 Accelerometer Sensor, ret:0
03-18 16:43:25.500 29657-29687/com.softatec.TheRoseKing D/Unity: Sensor : Accelerometer ( 1) ; 0.038307 / 0.01s ; BMI055 Accelerometer Sensor / Bosch Sensortec
03-18 16:43:25.615 29657-29749/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-18 16:43:25.615 29657-29749/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-18 16:43:25.655 29657-29657/com.softatec.TheRoseKing I/Unity: windowFocusChanged: false
03-18 16:43:25.680 29657-29687/com.softatec.TheRoseKing D/Unity: SetWindow 0 0x0
03-18 16:43:25.820 29657-29687/com.softatec.TheRoseKing D/Unity: SetWindow 0 0xa9d7e808
03-18 16:43:25.820 29657-29687/com.softatec.TheRoseKing D/Unity: SetWindow 0 0xa9d7e808
03-18 16:43:25.855 29657-29657/com.softatec.TheRoseKing I/Unity: onResume
03-18 16:43:25.930 29657-29657/com.softatec.TheRoseKing I/Unity: windowFocusChanged: true
03-18 16:43:25.935 29657-29687/com.softatec.TheRoseKing D/Unity: [EGL] Attaching window :0xa9d7e808
03-18 16:43:25.935 29657-29657/com.softatec.TheRoseKing I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@28e932c time:22745259
03-18 16:43:25.975 29657-29687/com.softatec.TheRoseKing D/mali_winsys: new_window_surface returns 0x3000, [1600x2560]-format:1
03-18 16:43:26.020 29657-29687/com.softatec.TheRoseKing D/Unity: ANativeWindow: (1600/2560) RequestedResolution: (0/0) RenderingResolution: (0/0) EGLSurface: (1600/2560)
03-18 16:43:26.030 29657-29687/com.softatec.TheRoseKing I/sensor: ASensor_enable: handle:0, name:BMI055 Accelerometer Sensor, ret:0
03-18 16:43:26.035 29657-29687/com.softatec.TheRoseKing I/sensor: ASensor_setEventRate: handle:0, name:BMI055 Accelerometer Sensor, delay:20000, ret:0
03-18 16:43:26.035 29657-29687/com.softatec.TheRoseKing D/Unity: Sensor : Accelerometer ( 1) ; 0.038307 / 0.01s ; BMI055 Accelerometer Sensor / Bosch Sensortec
03-18 16:43:26.035 29657-29687/com.softatec.TheRoseKing D/Unity: Choreographer available: Enabling VSYNC timing
03-18 16:43:26.050 29657-29750/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-18 16:43:26.050 29657-29750/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-18 16:43:32.235 29657-29919/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-18 16:43:32.235 29657-29919/com.softatec.TheRoseKing I/System.out: (HTTPLog)-Static: isSBSettingEnabled false

Start by reproducing the WebView lifecycle behavior on Android 6.0.1 using the supplied logs and the WebViewObject.cs and WebViewHandler.cs call sites. Trace the onPause/onResume sequence and PDF error, then compare it with another Android version. Done means the cause is identified and the page no longer reloads unexpectedly on the affected version.