TOPIC: can we use HTML in a field's value?

I had a radio field working fine with <hr> and some <b> tags in it to assist my users when filling out form. The field is a fee field. It was working fine up until today when suddenly nothing from that field was passing to the next step (no fees calculated). I removed those tags and it works fine. Is there a reason why?

HTML can not be used in the values of a custom field. You CAN use HTML in the field label. If you need to provide some instruction, you should use a Textual field type, which does support HTML.