Steps to reproduce:

1. Install fresh installation of v2.5 with Legacy Bridge.
2. Set up Solr instance (version 6.6) and set it up as usual for v2.5.
3. Create a new Object State Group with two Object States (for example: Visible: visible/hidden) in the Legacy admin.
4. Create a new Test folder in the Legacy admin.
5. Preview this folder in the Legacy frontend.
6. Open up Solr Admin panel (usually: http://localhost:8983/solr/#/).
7. Query the Test folder. Observe assigned Object State ids.
   
8. Change Visible Object State in Legacy Admin.
9. Query the Test folder again. Observe assigned Object State ids.

Result:
Ids are still the same. They haven't changed after changing them in Legacy Admin.

Expected result:
Solr should have updated Object States for Test folder.

Note:
Using ezplatform:reindex command fixes the Object States in the Test folder.