Casually I was clicking around to see the features and landed on the backup. That I did on the first time. I don't know why, I decide to check the words, and found out that I put one of the words out of the correct sequence.
My fault, but...

I'm aware of the issues, and use a password manager, with a backup strategy.

In order copy the words to the password manager, I need to select, copy and paste one by one. Somewhere during this process, I selected a wrong one and paste out of sequence.

I understand, the reason of this, single selection is to force people to go one by one and not loose the key.
But, not sure is really better than allowing to select all and paste to a password manager, correctly.