Fiori PR Workflow App

We are using PR approval workflow wave 2 and a custom workflow Task ID. We are using 7.51 NWGW and on EHP8 SP4

Able to see the PR in App and approve from App No errors shown in error log. PR document itself is approved in back-end. The message I get in App says "Message still processing please refresh" Only issue is with Workflow item. It is not moved to complete and still says ready for approval. Hence doesn't refresh the App work items.

Thanks in advance for responses.

Srini