Upvote:2
The doors were kept open.
On motion of Mr. M'KEAN, seconded by Mr. Smilie, — Ordered, That the doors of the Convention be left open during the session.
The reasoning doesn't seem to be recorded in my source, http://www.constitution.org/rc/rat_pa.htm
Evidently the session was a special case, as this is only recorded once, and references to the doors being closed are present in the speeches covered in the source.