My parents travelled from Mumbai to Rajkot in a sleeper bus on 25th December, 2016. The sleeper seat alloted to them was on the upper coach of the AC bus. The place where the glass pane of the window was placed was loose & due to that lot of outside breeze came inside through the window. We had no where else to sit or sleep as the bus was full.
We told the driver but it fell on deaf ears. They had to tolerate this all night & in the morning 8 am they managed to get a new seat. By that time they had caught very bad cold due to this exposure
Also they were supposed to reach Rajkot by 10.30 am, instead they reached by 11.45 am.