Game crashes after relaunch

So basicly, i'm developing a messenger game for android and I send messages to invite to a game. If I press on the invtation while my app isn't running everything goes right. However if my game is open when relaunching the game it instantly crashes. For example the game is running and I press on chaheads (the game doesn't close) then click the invitation and game crashes (as I understand after relaunch of game).
Here's the logcat:

 05-29 15:18:06.140 909-986/? I/ActivityManager: Displayed com.Shmutke.RPSChallenge/com.unity3d.player.UnityPlayerActivity: +279ms (total +584ms)
 05-29 15:18:07.287 909-1259/? W/InputDispatcher: channel 'a679306 com.Shmutke.RPSChallenge/com.unity3d.player.UnityPlayerActivity (server)' ~ Consumer closed input channel or an error occurred.  events=0x9
 05-29 15:18:07.287 909-1259/? E/InputDispatcher: channel 'a679306 com.Shmutke.RPSChallenge/com.unity3d.player.UnityPlayerActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
 05-29 15:18:07.379 909-1259/? W/InputDispatcher: channel '6b6d1bf com.Shmutke.RPSChallenge/com.unity3d.player.UnityPlayerActivity (server)' ~ Consumer closed input channel or an error occurred.  events=0x9
 05-29 15:18:07.379 909-1259/? E/InputDispatcher: channel '6b6d1bf com.Shmutke.RPSChallenge/com.unity3d.player.UnityPlayerActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
 05-29 15:18:07.380 909-2077/? W/InputDispatcher: Attempted to unregister already unregistered input channel 'a679306 com.Shmutke.RPSChallenge/com.unity3d.player.UnityPlayerActivity (server)'
 05-29 15:18:07.385 909-2072/? W/InputDispatcher: Attempted to unregister already unregistered input channel '6b6d1bf com.Shmutke.RPSChallenge/com.unity3d.player.UnityPlayerActivity (server)'
 

What should I do to resolve this problem?