I create a survey with 4 pages. The 2nd page contains a multiple choice list and a rule on this question (if user choose answer A then go to 3rd page else go to 4th page).
If the list contains a value with a space or a special char, then I can't go anywhere after the 2nd page : the label of the value seems to be used as an id.
If no value contains special char, it works and I can update the value with special char, it works too.