Ok, your on Forms 2.0 if you have to approve/unapprove forms.
So, I suggest you go into your Landing Page an approve the page (as it should be in draft mode because of the field update in your CRM). Check if this updated your form values.
If not,
then we need to delete the field from your form and drag n' drop it back again and that will have the updated value.
Go to the form and unapprove it. Check the values and then approve the form then approve the landing page.