Here is some clarity
1. Not the entire 7 mandals have been transferred to AP from Telangana. Only a few villages that are to be submerged by the Polavaram project have been transferred. Refer to the amendment text of the AP Reorganization Act
Mandals of
Kukunoor, Velairpadu and Bhurgampadu but not including its revenue villages of Pinapaka, Morampalli Banzar, Bhurgampad, Nagineniprolu, Krishnasagar, Tekula, Sarapaka, Iravendi,
Mothepattinagar, Uppusaka, Sompalli and Nakripeta under the Palvancha Revenue Division,
and the Mandals of Chintoor, Kunavaram, Vararamachandrapuram and Bhadrachalam but
not including the revenue village of Bhadrachalam under the Bhadrachalam Revenue
Division
Even in Bhadrachalam, the Bhadrachalam town is in Telangana while some villages in that mandal are in AP.
2. Hence a substantial geography of what you mentioned in the picture is still in Telangana. Hence it has not affected the Assembly constituencies. The reorganization might happen before the 2019 assembly polls. But for now, there is no change in the assembly constituencies.