Single sided HTTP POST split

Attached two pcap samples, one is a single sided version of the other, an HTTP POST.

When I process the single sided version (sample-upload2-req) conn.log shows two sessions (the HTTP POST tcp connection that has been split) and http.log shows a partial upload. However processing the original sample (sample-upload2-all) everything is as expected - one connection in conn.log and a complete http.log

Are there any parameters I can tweak to make this work?