Steps to reproduce

• Create a new form
• Add single line input (validation alphabet)
• Add button (with thank you message)
• Add location under home
• go on the frontend
• Try to submit the form with Test in the input field

Result

ERROR Value does not match the pattern.

Expected result

Form should be submitted

Additional information:

If you edit the form and change the validation to custom, publish the form, edit again and change the validation to Alphabet, then you can submit the form.
It seems that the validation does not work only on the first version