With or without the bug it's a horid prompt. Prompts work best when they resemble content LLMs have in their training data. People use first and second far more

With or without the bug it's a horid prompt. Prompts work best when they resemble content LLMs have in their training data. People use first and second far more often then LHS and RHS when talking about options. First or second, 1 or 2, a or b or neither. LLMs are narrative machines. They make up stories which often make sense.