We have been successfully running Forms 11 since late March. One of our most used processes includes a public form with hidden fields, and data lookups.
It had been working fine until the day after we recently upgraded to Forms 11 update 1 (Sunday August 29th).
Since then, there were reports from end users of sporadic LFF2107 (SubmissionError) messages for Forms Portal users, appearing at random.
Searching 'Answers' showed that these type of issues appear to be a possible regression related to hidden fields and Backend Validation settings. Turning 'Backend Validation' to 'No validation' seems to have possibly helped, but it was difficult to tell, we also turned 'Required' off on the initially hidden fields, but left 'Save the data when the field/section/page is hidden' turned on.
Then, the recent security announcement on Tuesday, August 31st, had prompted me to read the related 'List of changes' where I saw one fix that seemed to be related to the issue we had just encountered in Forms 11 update 1:
- Submissions no longer blocked when a field that violates frontend validation is inside a section, collection, table, or page that is hidden by a field rule. (307904)
That appears to describe what we were experiencing after Update 1, prior to the hotfix. However, after installing the associated hotfix that same evening, it does not appear to have resolved the sporadic issue, and in fact it has seemingly introduced a new bug related to file attachments on the same public form.
Now, in addition to the previous random submission error, we are also experiencing Forms submissions making it through without any files attached - even though the 'File Upload' field is set to required and the end users have verified that they attached files and successfully submitted, as required by the field settings.
This is not happening to all public form submissions of this specific process, but only some of them, and without anything that we can pinpoint right now. Some file submissions make it through with their associated file(s) and others do not.
The submission error seems to appear in the event viewer twice as:
1.) Event ID 9320 = FormsValidationAggregateException (HTTP Status code 400)
2.) Event ID 2107 = SubmissionError (HTTP Status code 403)
The missing File Upload / attachment doesn't seem to show in the event viewer that I can see.
What additional information can we provide to help troubleshoot and resolve these issues soon?