AR invoices missing intercompany lines thus messing up realized gain/loss line

Hi All,

We are currently in FSCM 9.1 MP11 and PeopleTools 8.53

I am encountering a weird issue after running AR Update process. An item is missing intercompany lines. Last year, this happened thrice. This year, we encountered this issue once.
This is happening specifically in one business unit.

For example, BU 17 has intercompany line 160000, but it does not have a corresponding BU 146 intercompany line thus causing an intercompany mismatch.
In such scenario, the realized gain/loss line 296003 will pick up the whole amount to balance the journal.  (However 296003 should not have big amounts).

I have attached the accounting entries as part of a document (these entries are just sample data).