A small interface issue…
I have two edit windows open, one showing a corkboard, the other showing the content of the highlighted card.
With the focus on the corkboard, I select a card and press ctrl D to duplicate it.
The focus changes in the corkboard so that the second, new, card is selected.
I click into the other window and start to edit, thinking I am editing the new card, the one that is highlighted. But it turns out that the text in the second window still belongs to the first card.