RMA default return location and scrap location

When we use the Sales Ledger and create an RMA from history, the location of the original sales order line is entered in to the RMA for both the credit order and the Purchase Order.

I would have expected that the location we selected for the return or scrap would be entered into the RMA/OM/CO that we create.

Anyone have an explanation of why this behaviour is being seen?

P40052 - OP return location = RMA, OP Scrap location = RMA

P4210 SO - Shipping location = B3-12

RMA = OM location = B3-12

If we are returning to the nearest repair location, B3-12 may not exist and therefore we get an error.