Hello Cameron,
Can you share the group
field settings and sub-fields that you try to update the value via POST API? I try with simple group
field
'fields' => [
[
'name' => __( 'Group', 'your-text-domain' ),
'id' => $prefix . 'group_ubce2rqmfm',
'type' => 'group',
'fields' => [
[
'name' => __( 'Text', 'your-text-domain' ),
'id' => $prefix . 'text_wulikp8w5km',
'type' => 'text',
],
],
],
],
and I can update the subfield text
value with POST API properly when using the latest version MB AIO 1.31.0.
Also, do you use any caching plugins on your site or on your hosting? Please disable them all and recheck this issue.