After fixing a "so called bug" in version 10.0.35 the sales line get updated with every thing from the alternative item financial dimensions but also sales unit.

Proposal is that it should be possible to on the item determine if that should be the behavior or not in the same way as I can determine when alternative item should be used. In some cases that could be a change of sales quantity by a significant number if for example going from pcs to pallets. So having a line with 3 pcs of item x and then it changes to item Y which for some reason have sales unit pallet, it the sales line now have 3 pallets, this might be adding 300 pcs to the order. The customer won't be that satisfied.