do you have {$requiredfields} & {$customfields} in member_register template of the theme ?
Yes, i do.
<ul class="list">
{$requiredfields}
{$customfields}
{$referrer}
</ul>
<h3 class="list-group__subheader">Are you human?</h3>
<ul class="list">
{$regimage}
{$questionbox}
</ul>
Any idea on what causes this? or a way to fix?