This happened over a decade ago when the section around Ghagra Pul near Barabanki used to be a single track. I was traveling via this train and it was stopped a couple of stations before Barabanki. Due to it being single track, we were subjected to numerous xings and overtakes. The train was stopped for ~1.5 hrs each at two different locations (where it had no scheduled stop). Many of the co passengers then were wondering if the train's engine had failed. It finally reached Barabanki after a delay of over three hours.