Other mistake: In this movie Korg has two biological fathers (he calls them that way); his race appears to be formed by males that reproduce by holding hands in lava pits. However, the first time Thor met Korg in Thor: Ragnarok, his backstory was that he started a revolution that failed because just his "mum and her boyfriend" showed up.
Suggested correction: It is possible among the Kronans, that one of the males is still called mum and use female pronouns. It's also possible that despite the fact 2 males can breed, it does not exclude females from existing.
Suggested correction: I see no reason why Korg couldn't have had a mother figure in his life, and not necessarily being of the same race. Technically speaking, he never specifically stated that his mom is who conceived or gave birth to him. I have no doubt that the writers didn't plan this, but it also doesn't create a contradiction.
Other mistake: In the theatrical end credits, Alan Silvestri's credit under the Captain America theme was misspelled as SilveRstri. This was fixed for home streaming.