AP Invoice workbench slow for MOAC responsibilities.

Recently we started facing issue in our production instance wherin the AP Invoice workbench form (APXINWKB) is extrmely slow in performance. It takes almost 2 minutes to launch and to navigate the form. This is happening for the responsibilities which are having access to multiple operating units. Interestingly, this isssue is only with this form, other forms for the same responsibility behave normal. Also, for responsibilities which have single OU access, the performance of the form is normal. The issue is very recent and performance was normal a few days back. We do not see any patch applied during the