If you want to place an order from an offer, but one of the items is no longer available (on sale), you can no longer place the entire order. An error message is displayed “The product [...] is no longer available”.

It is also not possible for the customer in the frontend or the admin in the backend to edit the offer afterwards and remove the affected item

This makes the entire offer unusable, which is of course particularly unfavorable for a B2B store, as customers here compile complex offer requests with 50 or more items.

It would actually make sense for the order to be placed anyway and for the relevant item to be removed with a message or for the item to be removed manually. At the very least, the admin should be able to correct it.