Custom Field doesn't retain inputted value

SUGGESTED

I am on X3 PU9

I added a custom field linked to a local menu to the SORDER table. I added the field to the SOR1 screen for Sales > Open Orders and validated all entry transactions. The field shows up just fine. However, when I try to edit the field on the open order, regardless of what value I select, once I hit save on the record, it flips back to the first value in the local menu. I have revalidated the screens and entry transactions. Just not sure why it's behaving this way. Any suggestions are greatly appreciated!!