Yes we have a sandbox, this looks like it was using the native NetSuite PO workflow. We have a custom WF, but if employee center is = false, its not using it, and this user doesn't even have employee center role assigned. So far the only change I can see a few hours prior to manager able to approve was vendor currency and cost was set on the line items. That's the only thing in the WF history that changed between him not being able to approve then approving.