As of the last update when I use the Companion App to copy a previous Meetup with the ‘Do it again’ button. Both the duration and the selection for ‘Keep Everyone Together’ are not copied. In my case the duration on the old Meetup was 1 hour 30 minutes, the new Meetup was just 30 minutes. The ‘Keep Everyon Together’ was selected on the old Meetup while on the new it was not selected.
Have been using the ‘Do it again’ for a long time and it had been copying everything fine.