If the clef, key and/or time signature changes inside a repeat section, it’s usually recommended to add a cautionary clef key, and/or time signature directly before the repeat barline, e.g. as shown in this example: https://i.stack.imgur.com/iyL4M.jpg
Elaine Gould also mentions it on page 234 of “Behind Bars”. I guess, this feature isn’t yet supported in Dorico – at least I couldn’t find a corresponding option – but is there a workaround to simulate this somehow?
Martin