CZ 512 in .22 Magnum - Fair Weather Firearm? Or did I get a Lemon?

I picked up the CZ 512 .22Mag semi-auto a few weeks ago and mounted a scope on it. When I took it out to sight it in, I had several issues. The rifle would cycle but the bolt wouldn't reset the hammer! The first outing with the CZ was during a low 40s day, the second outing was in the 20s. Does cold weather affect the reliability of this rifle? A couple months from now should reveal the answer. Hoppe's M-Pro 7 LPX Gun Oil, 2 Ounce Bottle https://amzn.to/3I7enMr Hydrosled on Amazon: https://amzn.to/2NXvXJh Frog Lube CLP on Amazon: https://amzn.to/37tfcfT TekMat on Amazon https://amzn.to/37Wt0RA Check out some of my favorite channels dedicated to the "Old West" and other firearms related stuff! Arizona Ghostriders    / @arizonaghostriders   Guns Of The West    / @gunsofthewest   Chuckin'    / @chuckintv   Squib Load    / @squib1911