unity3d - facebook unity sdk 7.0.2 - FB.IsLoggedIn returns false when you reopen the app but should still be logged in -

prior upgrading 7.x version of unity fb sdk, fb.isloggedin return true after fb.init. now, returning false , have new login every time.

this seems bug.

i'm on unity 5.1.1p4 , building android. haven't tried ios yet.

reproduction steps:

1. start app, login fb
2. close app
3. start app again, not automatically logged in fb (fb.isloggedin false)

expected behavior:

fb.isloggedin should true if logged in. how worked before.

in fbunityinterface.mm:

1. add - (id)init:

   [[fbsdkapplicationdelegate sharedinstance] application:[uiapplication sharedapplication] didfinishlaunchingwithoptions:null]; 

2. replace in - (void)configureappid:

   [fbunityutility sendmessagetounity:fbunitymessagename_oninitcomplete userdata:@{} requestid:0]; 

   with:

   if ([fbsdkaccesstoken currentaccesstoken]) {     fbsdkaccesstoken *token = [fbsdkaccesstoken currentaccesstoken];     nsinteger expiration = token.expirationdate.timeintervalsince1970;     [fbunityutility sendmessagetounity:fbunitymessagename_oninitcomplete                               userdata:@{                                          @"opened" : @"true",                                          @"access_token" : [fbsdkaccesstoken currentaccesstoken].tokenstring,                                          @"expiration_timestamp" : [@(expiration) stringvalue],                                          @"user_id" : [fbsdkaccesstoken currentaccesstoken].userid,                                          @"permissions" : [token.permissions allobjects],                                          }                              requestid:0];     return; } else {     [fbunityutility senderrortounity:fbunitymessagename_oninitcomplete errormessage:@"unknown login error" requestid:0]; }