Shared_prefs folder is cleaned when close/start android app

Hi guys

I’m trying to test Remember me feature for login. After successful login all login info (login, pass, evn) are stored in
file com.leverate.sirix.techservices.LoginService.xml.
But after AppiumDriver.CloseApp(); AppiumDriver.LaunchApp();
the folder “/data/data/com.leverate.sirix/shared_prefs” is cleaned. I tried the same test case manually - it exists.

It disappear after starting app.

C:\Users\Denis.Veselovskiy>adb shell
root@vbox86p:/ # cd /data/data/com.leverate.sirix/shared_prefs
cd /data/data/com.leverate.sirix/shared_prefs

root@vbox86p:/data/data/com.leverate.sirix/shared_prefs #
root@vbox86p:/data/data/com.leverate.sirix/shared_prefs # ls
ls
AccountProvider.xml
com.leverate.sirix.techservices.LoginService.xml

root@vbox86p:/data/data/com.leverate.sirix/shared_prefs #

root@vbox86p:/data/data/com.leverate.sirix/shared_prefs # cd /data/data/com.leverate.sirix/shared_prefs
ata/com.leverate.sirix/shared_prefs <
/system/bin/sh: cd: /data/data/com.leverate.sirix/shared_prefs: No such file or directory

Env:
win7 x64
appium.exe 1.2.4.1
c# client
instrumentation selendroid
device - genymotion emulator, android 4.3