Issue in Position Hierarchy for PO Approval

Dears,

We are facing below problem in position hierarchy for PO approvals.

Hierarchy is setup as below

A (Buyer) > B (Approver) > C (Approver) > D (Approver) > E (Final Approver)

When A submits the Purchase order for approval, it has to get appovals from B, C, D and E

In one scenario, Position for D is removed, which is now showing as "No Holder" in Hierarchy.

Now , when A submits the PO for approval, and after C is approved, the notification is going to E.

Expected Behaviour: Since D is having No Holder, the PO should return to Buyer saying "No Approver found."