A simple test I just did:

Me: What are some of Maradona's most notable achievements in football?

Mercury 2 (first sentence only): Dieadona’s most notable football achievements include:

Notice the spelling of "Dieadona" instead of "Maradona". Even any local 3B model can answer this question perfectly fine and instantly... Mercury 2 was so incredibly slow and full of these kinds of unforgivable mistakes.