ESettlements Vouchers Missing View Invoice Link in Workflow Approvals - Does not affect non-ESI

Peoplesoft 9.2.50

We recently upgraded to PUM 50 and since then, ONLY the eSettlements (SSI voucher source) vouchers are missing the View Invoice link in voucher workflow. The attachments are present. They are accessible if you navigate to the voucher record and use the Attachments link on the Invoice Information tab. But the view invoice is not present on the workflow page. Again - this does not affect other voucher sources - only SSI.

I also verified nothing is hidden on Page Composer (else would impact all vouchers).

Any idea where to focus our efforts to troubleshoot this?