When Sarah returns home with her son after encountering Gary at a coffee shop; she puts her purse on the kitchen counter-top. However, the look of the purse changes from one cut to the other. It goes back and forth between not having and having ornaments on the strap of the purse.
When Trina was talking to Gary about Frank and Sarah; the actor in the background sitting down in the office at one point looked at the camera.
During the taping of Sarah's testimonial regarding Safehouse Security Company; the boom operator is wearing a mask. This is the only actor throughout the film to wear a mask. Now, this might be a subtle way for the film to acknowledge the existence of Covid-19. It might also be that in the real world the actor playing the boom operator was taking precautions.
When Trina asks Gary for his email for the purpose of investigating him; he grabs his company business card. This doesn't make any sense since she could have gotten his business card as well as any other company employee's business card on her own.