I ask buyers of the magwells to lock the bolt back before they join action and the chassis. Ruger's manual does not require that, and for a good reason: once the bolt is locked back, it's very easy to lose a pin. However, I found that users sometimes manage to catch the tip of ejector on the stripper rail area of the bolt, and then they crush the ejector down, using the chassis and the action like a vise. Having the bolt back prevents this.
The annoying part is, shells can continue ejecting upon the "spine" of the busted ejector, it's just not reliable and leads to stovepipes. So it can lead down the rabbit hole of changing extractors and springs.