Android app disappears sometimes from apps screen

问题:

My android app appears and disappears on app screen indeliberately.

I couldn't find why this problem happens.

• Is the problem happening because my app manifest ?

• Is the problem related to the android version ?

etc..

Spec

Device manufacturer : Samsung

Device model : SM-T311

Android version : 4.4.2

How it happens

• I install my app from email
• I open my app and use it
• I press home button
• I press apps button

I couldn't see my app

How I solve this

• I again press home button
• I again press apps
• I see my app

Note

I don't see this problem with any other devices

Any help is appreciated !