9.2.7.2 PO is approved and shows as approved in P43081, but in the P4310 hold code still shows?

Wondering if there is an explanation as to why when a Purchase Order was approved by the highest level approver and shows as such in the P43081, but not in the P4310?

We ended up doing a Row Exit on the PO in the P43081 and then selected Remove Msg and that made the fix, but wondering if there is an explanation as to how this issue is occurring.