Backorder display

I use Storefront theme and use Backorder Management Pro to limit backorder quantity.

Backorder setting. 1- allow back-orders : allow but notify customer 2- backorder description : – xyz

In single product page and checkout page – “xyz” is displayed but in “order confirmation/thank you page” – “backordered:1” was displayed instead of “xyz”.

I expect the same display (“xyz”) in single product page, checkout page and order confirmation/thank you page. Pls help to find a solution.

thanks Ken