Preconditions:

• Added tag e.g testTag under Root tag in Content / Tags
• Added ibexa_taxonomy_entry_assignment field type to CT Folder with Taxonomy set to 'Tags'
• Added content Folder under Ibexa DXP.

Steps to reproduce

1. Log in to back office.
2. Go to Content / Tags.
3. Select tag 'testTag' from preconditions.
4. Switch tab to 'Content'. 
5. Click on 'Assign' button and in UDW assign tag to folder content from preconditions.
6. Publish.

Actual result:

Assigned tag is not displayed in content field ibexa_taxonomy_entry_assignment.
Assigned tag is not returned in solr.

Expected result:

Tag is assigned to content field ibexa_taxonomy_entry_assignment and visible in solr.