Navigation Problems on iPhone and Mac - Participants Cannot Finsh Survey

Hi there,
I've reported this as a bug twice on bugs.limesurvey.org . Users on any Apple device (iPhone, iPad and Mac computer) cannot complete a survey because the Next button doesn't work a few questions into the survey. In my first bug report - <a class="bbcode_url" href="https://bugs.limesurvey.org/view.php?id=16121" target="_blank" rel="nofollow noopener noreferrer">bugs.limesurvey.org/view.php?id=16121</a> - I attached a screenshot and the message the participant is shown "Please use the survey navigation buttons or index. It appears you attempted to use the browser button to re-submit a page". Back then I was on version 3.22.11+200330. My more recent bug is https://bugs.limesurvey.org/view.php?id=16501, this is with the latest version 4.3.3+200707.
This is extremely frustrating, and makes us look bad as an organization. We're sending surveys to 1000+ participants and those with iPhone, iPad or Mac devices can't get past the first few questions. I've had no action in response to the bugs, and if I can't get this resolved I'll be moving to SurveyMonkey or LimeSurvey Pro, but I'll have to be convinced my survey will work first!
Any suggestions appreciated.
Thanks,
Tom

Sure, I've attached the .lss file. It's not a long survey, though a number of the questions have conditions based on previous responses.
Thanks for quick response.
Tom

Let me try that again

Is that something you could help me solve? I see that you have a survey consulting company, and I would be happy to pay to get this resolved.
The LimeSurvey build is 4.3.3+200707. database and DBv ersion MySQL 10.3.23-MariaDB-cll-lve, Server OS Linux, web server software & version Apache 2.4.43, PHP Version 5.6.40. Our domain is hosted on Islandhosting, and the LimeSurvey build is provided by them and installed using Installatron, we have a ComfortUpdate key. The survey theme is out-of-the-box "fruity". I will try the demo site, I've not used that before.

Actually, I was wrong on the PHP version, it's 7.4, and I've attached a screenshot of the activated and available extensions. . Do you see anything that points to an issue there?

Can you recommend anyone who might be able to help?

TomBenj wrote: Actually, I was wrong on the PHP version, it's 7.4,

Looks like you use cPanel with your hosting. You should be able to change your PHP version as well, right?
I recommend to change to PHP 7.3 for a while.

If you still cannot reproduce the issue on your own (since you don't own a iOS/MacOS device with safari), the error reporting is from your survey visitors. Are they all from different areas? Or is it a survey with a certain group of visitors (e.g. one company)? Since we don't know which Safariversion was used, it might be a certain safari issue which is matched by a LimeSurvey bug.


The error message "Please use the LimeSurvey navigation buttons or index. It appears you attempted to use the browser back button to re-submit a page" can be triggered by many different things. That error message is an evergreen. If the issue is always at the same page, it can be an content issue of the page. You should copy the survey and reduce the survey to just the problematic question and check again.


I recommend to switch to LS3 (even though you got these reports there as well) and to PHP 7.3. If you still got these reports, you might ask the reporter about the exact version/device.