When some update for example, shipping adress or when return is created on an order. The totals and everything are recalculated. If a price has changed on an article during that time commerce manager picks up the new price on both listprice and placedprice. This is so dangerous i cannot believe it.
Does anyone have a solution for this?
I can confirm this is a bug. I'll file a bug for this and we will work on this right away.
Thank you for bringing this to our attention.
Just to follow up: This was fixed in Update 134.