Contact not saved after editing

Hi. I discovered a couple of problems with Zoho contact.

(1) BUG. Contact is not saved after editing. If you edit an existing contact by putting a bracket in one of the fields you get the message "Contact updated successfully" but nothing is saved. All updates (including the other fields) are lost. Steps to reproduce. Go to an existing contact and change the first name to "Robert (Bob)".

(2) In the phone number fields you can only save numeric data (0 to 9). This seems an unneccessary restriction. I often want to add text notes alongside phone numbers. eg "office", "workshop", "computer room". Zoho displays an error message saying the data can't be saved. Can this limitation to be removed, please. I notice that the restriction does not apply when data is imported into Zoho. So some of my numbers do have text notes because they were imported.

Thanks, Bob