New Purchase Order numbers not updating to current auto sequence numbers after converting orders to bills

Hi, When we convert an existing purchase order to a bill, it retains the original purchase order number which is how our preferences are set and this is ok, however when we then later enter another new purchase order, the auto sequencing picks up the next number from the converted bill, rather than the next PO that we are up to.  The new purchase order number is not the next new order number.  eg Order 1000 converted to bill, retains same number 1000 on bill.   When a separate new purchase order is entered, default PO number auto sequenced to 1001, rather than say 1050 (which would have been the next PO number if we had not previously converted the first order to a bill).   I do believe this has been raised before on other threads and myob was investigating, as below in red..? Retaining Original PO number between Quotes, Orders or Bills | MYOB Community - myob response on this previous thread -  (Should also point out, we've had some cases of with that Retain Original PO number being enabled that after converting that number sequence is reset back to that converted number i.e. if you record 0000014, then convert 0000010 the next number in the sequence is 0000011, then 0000012... This is something that we have raised with the required team for further investigation.)

 Is there a way to stop this from happening? Thanks 

(We have also set preferences to warn for duplicate purchase order numbers on purchases)