I have gotten a large numner of errors in the console this morning telling me that none of my breadcrumbs contain an ID. This is true, but it has never been required before. If I add an ID property and try to validate using the structured data validator it says that ID is not a supported field.
I checked the Google documentation for breadcrumbs and if you check the markup examples they have given, none of them contain an ID either. The Schema.org spec doesnt show ID, Google's docs dont show ID support and Google's own structured data testing tool says ID is both unsupported and supported. What is the issue here? Does anyone have an example of how Google want us to implement this?