[Groff] ms .AB/.AE abstract loger than a page = macro error: cover sheet overflow

[Anton Shterenlikht]

I have a document with an abstract,
inside ms .AB/.AE, that is longer than a page.
With groff -ms ... I get

macro error: cover sheet overflow

and the abstract is truncated at the end of
the first page. Is this the expected behaviour?

Of course the point of an abstract is to fit on one page.
However, it is always good to know the rules exactly. 
So is ms supposed to behave in this way?

Thanks

Anton