Sudden 'Already Submitted' Error

We currently operate a 2-form system where Form 1 (https://form.jotform.com/60276120475148) is completed internally and then, when submitted, prompts a link to Form 2 (https://form.jotform.com/60275042207143) to be sent via email to a customer (that is uniquely tied to them) with several pre-populated fields carrying over from Form 1.

Everything was working fine until today when we noticed users were receiving an error message when attempting to submit Form 2. See screenshot below:

In my initial troubleshooting I came across this post in the forum and confirmed that our settings for Form Limits were in fact not the issue.  http://www.jotform.com/answers/791708-Already-submited-error-when-submitting

I then tried submitting Form 2 directly (without the unique link typically delivered from Form 1) and was able to submit without any issue. This will not be acceptable for our customers as we need the each application to begin with Form 1, but it does tell me that the issue lies with the connection to Form 1, right? Any help is greatly appreciated.

As I tried to submit your second JotForm, I see the error message. Comparing the form from the other thread provided here, I see that there are some similarities such as multipage form and added Progress Bar widget to the form. I think the issue is being caused by Progress Bar widget. However, I'm still investigating the issue and I'll get back to you one I found any helpful information in this regard.

Thank you for your patience. 

It appears that there was a problem with 'continue later' session based form submissions today. Our developers have applied a fix, so the forms should be fine now.

We are sorry for the inconveniences caused.

Appreciate the follow-up. Glad to know it was a system error and not something isolated to our office. Thanks for letting me know!

On behalf of my colleagues, you are welcome.

Feel free to contact us if you have any other questions.

Thanks for letting us know - appreciate it. I didn't run a test or anything yesterday to know for sure if we were affected, but we did not have any feedback from customers stating they had issues. It seems to be functioning correctly now so that is good.

Thank you for the update. If you need additional support please let us know and we'll be glad to assist you.

@OVJotForm
I've moved your question to a new thread as we aim at having one question/user per thread. You can find it here:

http://www.jotform.com/answers/794953