Metadata/ frontmatter of cmd file visible by some model

I dont know how you guys set for the vision of model to the mdc file. But I suppose the metadata part is supposedly unseeable for models. I tried for multiple models and find that if the editor is set to be mdc editor, they can see the metadata. if editor is set to be text editor, then the sonet family can not see the part but deepseek and chatgpt can

clearly there are inconsistency between different models.