NAME not splitting to FNAME/LNAME

I recently changed my WP Site Address to move the site out of dev. Prior to the switch, the NAME field was correctly splitting to FNAME and LNAME in the MailChimp list.

However, after the switch, it no longer works. I didn’t change the form at all.

Any idea what could’ve happened?

Here’s the form code:

<div class="form-group">
<label for="name">Name</label>
<input type="text" class="form-control" id="name" name="NAME" placeholder="Enter your name…" required value="">
</div>
<div class="form-group">
<label for="email">Email</label>
<input type="email" class="form-control" id="email" name="EMAIL" placeholder="And your email…" required value="">
</div>
<div class="form-group">
<input class="submit btn btn-default btn-lg" type="submit" value="Sign up">
</div>

Thanks for your help.

https://wordpress.org/plugins/mailchimp-for-wp/