[bairy]

Rich,
It's because the templates aren't cached under the ?do=extra.

I've done a quick way of doing it though I'm not sure it's the best:
Add new plugin under General >> cache_templates
I've called mine Extra Profile Page Cache Templates

Content:

PHP Code:

if (THIS_SCRIPT == 'profile' AND $_REQUEST['do'] == 'extra')
{
$globaltemplates = array_merge($globaltemplates, array(
'page',
'userfield_checkbox_option',
'userfield_optional_input',
'userfield_radio',
'userfield_radio_option',
'userfield_select',
'userfield_select_option',
'userfield_select_multiple',
'userfield_textarea',
'userfield_textbox'));
} 


Then the templates will be cached when editing of that page is requested.