I was trying to copy a 19th century chorale setting. In this piece the barlines do obviously not reflect the real lenght of the measure. So I made some time signature changes to allow Dorico filling the bars with the amount of beats needed:
This is a new feature in 6.2, allowing Dorico to provide cautionary and restorative clefs and key signatures at repeats – in this case, warning the player that he’ll see a different time signature when he takes the repeat.
If you don’t want this, then set Notation Options > Repeats to Do Not Track.
Thanx again for your kind help. I would never have found this. By re-reading the versions history I saw it mentioned there, but in the Dorico Help it’s missing (help is indicated being related to version 6.1.).