Yesterday I had been to UBL to give dinner to one of my relative travelling in 22498 Humsafar. Train was on time until Kundgol, then after donno what went wrong, it was made to stop at Kundgol. 12649 arrived Kundgol just after 10 minutes. Further 12725 was made to wait at Gudegeri and 17309 at Yalvigi. There was chaos all around the station at Hubli as no announcements was made for the delay caused. Upon enquiry, I was told that loco of humsafar is failed. But Iam not satisfied with this reply, if locomotive is failed, it would hardly take 15 minutes from UBL to send rescue loco. Iam just guessing there might be some other issue like derailment or so of Humsafar which arrived first at Kundgol