It use to get delayed when Slip was amalgamated at ALJN and OT happens for route clearance. With no LC/Amalgamation at ALJN, that 1 hour slack has been pushed for ALJN-CNB & OT happens past ALJN not in KRJ-ALJN which helps it retain schedule till CNB!!
As of now Sangam Exp is running with 1 extra hour in ALJN-CNB & just one scheduled OT by MUV SF in CNB-PRYJ!!