Saiga-12's spawn in with a different shell in the chamber than in the mag

Very minor thing, but the chamber of saiga shotguns is different from the magazines loaded in with (scav runs and AI). In the screenshot, there's a CSP slug loaded into the chamber but the mags are Grizzly 40

So upon doing some more raids it seems that chambers are actually getting loaded with different rounds than mags for all guns. I picked up a UMP from a pmc and the chamber was RIP but the mags were lasermatch