SO releases through EDI are being closed

I have the following problems, which dealing with Epicor support for more than a month and not able to give me any solution yet in E9:

Orders are received in the Epicor through EDI Import process and the SO are being created, but the released of the Sales releases are showing closed. I dont understand why are being closed the released.

Looks like when comes a new SO, through EDI it is showing open, but if it is a release of the previous SO it is closing

the Contract header matching is with “Reference” and “Ship by date” .
everything should be open when it comes in Epicor

any suggestion or ideas will help.