iMac under El Capitan
Sorry I can’t be more explicit, but very often, if the montage is not playing and I go to the save montage dialogue, enter a filename and press return, the montage plays from the current position, rather than saves. Altering the file name and then pressing return key saves the file, most times.
Will work on it and if I can get more definite indications of when the return key works and when it doesn’t, I will post again.