Yours is a more recent production civilian gun, not a C&R surplus military gun (the safety on the slide is only on the new production ones), but as with old and new Yugo firearms, they are great and robust, good shooters, but the fit and finish isn't great. Lots of machine marks.
My first surplus Yugo Tokarev was like new, hardly used. The machine work was so rough, the slide would stay back just from friction.
Get out the permanent marker and find where things are rubbing badly and hit them with a stone, some fine grit sandpaper (use a flat backer like a piece of wood), etc. Or just shoot it a bunch, that would probably do it too.
I was impatient so I buffed up a couple problem areas (one was the actual hammer where it contacts the rearward slide) and it is fine now.
Mine came with TWO spare firing pins, are these known to have issues?