For overtake by HWH-RXL Exp & probably ECR not wanting to accept it so early. I don't think ER will late start it, as there is maintainance block over HWH-BWN up lines post midnight .
Himgiri Express when started, used to take about 29 Hrs. in 1978 (with WDM2/ICF rake) which is now 37 Hrs. in 2023 (with WAP7/130mps etc).