When working with logic jumps, the progress bar does not show the correct progress (because it’s not clear in the beginning which questions will be skipped). My testers were confused because for them it seemed that the study would take ~90 minutes, although it was just ~15 minutes. For such situations, it would be helpful to hide the progress bar (optimally only for the first pages, until the questions are answered which are needed to calculate the total amount of questions for the regarding user).