When requisitioning, suggestion may disappear when purchased

Was wondering if anyone else has this problem...

A requisition is made. The suggestion is sent to a purchasing agent.
When the purchasing agent chooses that item and creates a PO, the PO
is created but without the suggested material. If you look at
Requistion tracker, there is no PO associated with the requisition.
There is no suggestion in the box either. Where did the suggestion
go? The only way to bring the suggestion back is to 'Reset the
dispatch' of the requisition, and then refresh the PO suggestions.
The material magically reappears. Has anyone else seen this problem?

Thanks

Kevin Berry