Steps to reproduce

1. Built e-commerce with dx-core 6.2.11-SNAPSHOT (on 6.2.9 and 6.2.10 it works)
2. Add Category list from Commercetools (with Magento, Salesforce categories works ok, not tested with SAP) to a page
3. Expand a category => any child category isn't visible, exception is thrown in the log

Expected results

Child categories are displayed, exception isn't thrown

Actual results

Workaround

Development notes