Comment 5 for bug 1829601

I don't see a chance I can fix this during this week. So it schold not block 2.2.2

On the other hand there is a one liner hack possible.
https://github.com/mixxxdj/mixxx/blob/8deb7427a4e016f47e4f6a4d767e8158d7147235/src/library/playlistfeature.cpp#L110

"if (false)"

addMultipleTracks() keeps the order.

A better solution would be to pass a flag if the order should be persist and consider also the source pointer.

If you find time, please take over.