Undefined index when updating ACF records with WP All Import

[aoxenrider]

stream/connectors/class-connector-acf.php

Line 617 in 394c4c3

'field_label' => $cache['field']['label'],

I get the following error when doing an import to update a taxonomy that uses Advanced Custom Fields (ACF).
PHP Notice: Undefined index: label in /home/site/public_html/wp-content/plugins/stream/connectors/class-connector-acf.php on line 617

Turning off monitoring this would be sufficient for my use but ideally finding out why it's an issue would be best.