Nope. I just checked NTES and it mentions that train is at Whitefield. So I guess 12628 will arrive in PF 1-7 itself
Btw: I guess SBC division is using Sanghamitra rake as spare rake for Mail (only 1 2A needs to be removed and 1 SL to be added). That's why 12658 is departing 1 hour late (since Sangha arrives around 5 and then time needed for PM)