DBClientsManager authorizeFromController after unlinkAndResetClients

I've found that calling DBClientsManager authorizeFromController after unlinkAndResetClients when using browser-based authentication results in an empty browser screen.

 

I don't think I'm doing anything unusual, just basically the following

    

    [DBClientsManager unlinkAndResetClients];

 

 

and some time later

 

 

    [DBClientsManager authorizeFromController:[UIApplication sharedApplication]
                                   controller:self
                                      openURL:^(NSURL *url) {
                                      [[UIApplication sharedApplication] openURL:url];
      }];

 

Note it works as expected if the Dropbox app is installed and when using the "in app browser authentication" that was available prior to ObjectiveDropboxOfficial 3.0.11.

 

I'd appreciated any insights as to what is happening and how I might resolve it.