When I try to merge transactions, I sometimes see a dialogue asking me if I'm sure.

The dialogue states "The one you selected first is the top one, and its values will be used in the merged transaction. Cancel and select the other transaction first, if you want its values to be used."

When I cancel and select the other transaction first, I see the same dialogue with the same transactions in the same order.

I think this is a bug. I'm using KMyMoney Version 5.1.2-bd835cb.