Admin UI displays item twice after removing previous main translation.

Prereq.: Solr or Elasticsearch set as search engine (does not affect Legacy SQL).

Steps:

1. Create folder in English.
2. Add French translation.
3. Switch main language to French.
4. Remove English translation.

Actual result: Folder is displayed twice in Content Tree and on Dashboard (see attached). The issue is resolved after running ezplatform:reindex command.
Expected result: Removing previous main translation does not require running the command.

Remarks: Does not affect v2.5.13.