Maybe its the sign of the times in the industry, but the fact is that a good many guns need attention new out of the box.
Having a feed problem on new and near new pump guns is not that uncommon . That includes the Benneli Nova I adjusted for the same reason a couple weeks ago. They run very simular style shell latches as the Winchester.
Several Mossbergs this fall including a number of 835's , and Dave will be happy to hear that the Remington 870's generaly have less of this problem until they are older and caused be wear.
There are times when tolerances build up in the manufacturing process and just replacing a new part with another new part may not take care of the problem, but in most cases it will .
Most shell latches I have done over the years , were adjusted and not replaced . This is not an option for many gun owners who are not familiar with the mechanics of their firearm so replacement is just easier in most cases.
Your problem should be covered under warranty if a new gun.