Form error on Submission

We just came across ANOTHER issue. One of our users was trying to submit this same form and came across the following error message after clicking the submission button. The form never submitted and now we have to have our customer fill out the form again from the start. Please advise on what happened and let us know what you are doing to fix the issue. 

It looks like that our redis key-value store server was overloaded at the moment of the form submission. Although, I have not found any similar reports. We will keep monitoring the service closely to make sure that everything works as expected.

I understand. Since the error message is related to our Redis server and our backend team is continuously monitoring the services running. Please do let us know if you still encounter any such issue with your form so that we can take a look again and see what best we can do for you.

Thank you!