Given how many errors I have seen in my years as a reviewer from well before the time of AI tools, it would be very surprizing if 99.75% of the ~20,000 submitted papers to didnt have such errors. If the 300 sample they used was truly random, then 50 of 300 sounds about right compared to errors I had seen starting in the 90s when people manually curated bintex entries. It is the author’s and editor’s job, not the reviewer’s, to fix the citations.