I've had jamming with both the Chicom and Russky lacquered steel-cased ammo in my Finnish Valmet 62s, especially as it begins to heat up.
However, it shot fine in my early Maadi AK, and both ChiCom & Yugo SKSs. I note that all of us that have experienced problems with sticking, have indicated it was in firearms that do not have hard-chromed chambers and bores, e.g. VALMET, Colt, Ruger & etc. I suspect the special coating is less prone to being adhered to by hot lacquer.
On the otherhand, the copperwashed steel cases which I've used, have never failed.