I made a transaction with market price, edit said transaction to change something, now it uses the earlier determined market price as a "price set manually" resulting in completely wrong values when coin/coin numbers changed.
When duplicating a transaction, the same thing happens. But while duplicating, manually setting it to "empty" will not reenable market price. Because of the bug I'm required to duplicate with a wrong manual price and then edit again to empty the field to get the market price. This bug did not exist early December.
This bug is evil and its hidden nature forced me to redo everything I did yesterday. I was lucky I managed to spot it quickly....