It’s mostly people with a low number of cores who experience this (like me) but it is a problem with the game only using half of the available cores,and any thread that needs work done running full throttle without regard to the other threads,no synchronization of any kind in the game code,usually(in a proper multitasking environment like windows) this would be ok since the other threads would just run on the other cores,but this game has trouble using all the cores so the game freezes,either stutter or even for seconds,until said thread has done it;s work.
Little vid to show this happening,process explorer in the background shows real time thread usage,oh yeah also right alt+enter gets you into windowed mode and there you can record whatever you want,you can also use the menu to do this or use borderless window if you prefer.
Also a maybe useful post/thread