While using the share dialog, it seems to behave differently for each Facebook account. As shown in the attached picture, when using functionality with Account A, there is no redirection, but accessing with Account B results in redirection and the UI is different as well. Is there a difference in permissions among accounts, or do they have different versions? It appears to be implemented differently for each account, and it's quite puzzling as there is no related official documentation. Is there anyone know about this matter...?
The different behavior is not due to two different accounts. It is due to you invoking the share dialog for those two accounts on two different platforms - one a mobile device, the other a desktop, laptop or tablet. Read here: https://developers.facebook.com/community/threads/8468366766534493/