Starting this as a support request.
If I have a global OG image tag outputting a default site image and then for my content types I have a more specific tag that uses the image in an image field.
If that image field has no image in it I get no OG image tag.
I think it would be useful in this case for the global image to override the empty value.
Now I understand maybe not everyone wants this behaviour but maybe it could be optional as I think a lot of people would want it for things like this image tag.
For a start, is this behaviour currently possible? It seems like it is not.