It is possible that all "mistakes" in the film that involve visible equipment are intentional, or at least intentionally uncorrected: the film, after all, is about the artificiality of making a film, and the initial credit sequence shows filmmakers shooting the film itself.
At 1:37 and 1:39 at the gas station and subsequent car accident exiting the gas station, the camera crew and boom mic can be clearly seen in the reflection of the red Alfa Romeo (side of car and back of car respectively).