The Samsung Galaxy S20 series features top of the line camera hardware and generally takes great pictures. However, the phones still appear to struggle with pictures of pets, which has been an age-old criticism of Samsung's cameras.
https://www.notebookcheck.net/Looks-like-Samsung-is-still-unable-to-consistently-deliver-great-images-of-your-pet-with-the-Galaxy-S20-phones.456126.0.html
While I don't shoot dynamic subjects often(which is why my Gcam defaults to astronomy mode), failing to detect motion and raise the shutter speed sounds like a beginner's mistake that even P&S from ~5 years ago already solved.