Is that really surprising? "Apartheid" is literally an Afrikaans word, and it's often used specifically to mean the historical South African system instead of the technical international law term.
Should it be surprising? Yes. Am I surprised? No I have a pessimistic view on Tech's relationship with Apartheid Israel. For all the flexibility of ChatGPT it would be strange for it to be so pedantic as to differentiate based on etymology.
It has been adopted as a word in a technical international law term as clearly evident from the fact that there exists an Apartheid Convention[0][1].
