Indian Railways — train unnecessary halted for 3 hours

Address:

Varanasi, Uttar Pradesh, 221001

Train number 12581 (Muv sf exp) departed from manduadih junction on right time (22:30 hours) for new delhi via allahabad on 20/05/2018. It reached allahabad on time but it was unnecesary halted at allahabad station for approximately three hours without any
Apparent reason. All other trains were could be seen arriving and departing smoothly. What is this... Are the passangers like animals... Unnecessary delay... Only because of signal miscommunication.