It would be ironic for one to rely on a machine to detect machine generated text. You should not feel hard done if a machine adjudged your post to not be 100% human generated, it's a tool and could have flaws at times.
Sometimes I always check the results of the text that I make on the AI detection engine and the results are not very satisfactory and have tried several detectors but the results are always different from each other, meaning that there are still many deficiencies that occur and cannot be guaranteed to be 100% accurate, but I'm not going to be ironic because if you or you guys don't use Chat AI to post it will be fine, even if it's just shitposting but Chat AI is more dangerous because I will consider it plagiarism not your own work.