CompositeComponent Primefaces Dialog appendTo ="@(body)" not working

Question

I'm using PF 5.1.5 and made some composite components with dialogs which all should be modal and appended to body (so the dialog is really modal). This works when I use dialogs in plain pages, but not if I use them in composite components. I think because the @(body) tag references to the composite component itself? Anyone got a solution?