I have certain date fields on the form, I put the Display format as "MM/DD/YYYY" and also specified the same format for Validation.
Even though the data which gets populated pertains to the same format(MM/DD/YYYY), even then the validation pop-up appears saying that "DateField Validation Failed"
I am not sure whether there is a known issue on the Designer or there is something I am missing.
I happened to solve this issue. The thing is, I defined some more custom validation functions on these date fields, apart from the Validation Pattern. Once I remove those custom validation functions, this issue got resolved.
Just thought of sharing the resolution, thinking that someone may face the same issue.