R12.2.4 Payables: Payments form has performance issue

I have talked about XLA slowness in Payables before, but the My Oracle Support note "R12: AP: Performance Issue With Payments Form (APXPAWKB)" from article 2117534.1 has no hooks into XLA but still has a performance issue due to indexes that appear to be missing or incomplete on AP_INVOICES_ALL!