Issues when editing purchase orders

Issues when editing purchase orders

I have created a Purchase Order,  Items were marked as received. I then edited the PO to make some notes in the Remarks section and now seams to be stuck at  Pending Approval and will not move to the next step.
 
Required By :
PO Status : Pending Approval
 
Under actions >
 
Submit for approval >Which goes to the approve tab and it shows approved.
 
Having another user trying to approve this make no difference
 
Please advise
 

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