Bedding isn't usually done to affect the reliability or mechanical functioning of a firearm.
Bedding is done as a way to enhance a rifle's accuracy. It involves casting a bed of purpose designed epoxy where the stock contacts the receiver of the firearm. The receiver is coated in a releasing agent and then placed in the stock and allowed to sit so that the epoxy forms exactly to the individual action. When properly done, a good bedding job insures that the receiver is perfectly mated to the stock, thereby eliminating any shifting or flexing that can adversely affect accuracy.
But it shouldn't have any affect, one way or another, on a rifle's reliability. Depending on exactly how and when the rifle is malfunctioning, it could be any number of things from a weak ejector spring to a mis-shaped or damaged extractor to faulty ammunition. But is probably isn't the bedding job.