Not nearly enough context to be a front page post but here we are. Does everyone just give up on all fundamental expectations including determinism when they see AI in the title? Is the AI final boss to take over the front page of hacker news? /rant

To answer the question I would highlight the wrong regions in neon green manually via code. Now feed the code (zipped if necessary) to the AI along with a screenshot. Now give it relatable references for the code and say "xxxx css class/gtk code/whatever is highlighted in the screenshot in neon. I expect it to be larger but it's not, why?"