EDIINT inbound transactions staying in NEW status

We have EDIINT frame work that is followed by all the inbound and outbound partners. But couple of partner´s transactions stay in NEW status sometimes.

Not sure why the same partners have these issues and only sometimes.

Do anyone come across this issue?

Thanks,
RK

Please check the EDI content and partner profile, it seems the document has some partner profile info wrong. please correct me if iam wrong