I believe it's rather ER's irresponsible controlling here, instead of ECR. It's ER who decides the order of entrance at the zonal switchover point (which is Jhajha here). ECR can't simply dump over its queue, it's the receiving zone (ER) who is the authority to decide the order of entrance. And ER probably decided to let the on-time Garib Rath enter first, since it's anyways a high priority train of the mainline. Hence Kumbha was probably detained at JAJ for the exact reason.
(P.S. Both are ER trains, so no questions of zonal bias here)
please wait...Translate to EnglishIt seems like the fault lies with ER and not ECR. ER calls the shots at the zonal switchover point (Jhajha). ECR can't just mess with its queue - ER decides who goes in first. Garib Rath was on time and a top priority, so ER probably let it go ahead. That's probably why Kumbha got held up at JAJ. Both trains are from ER, so no bias here.