Orejime entities translation is disabled while saving settings

Problem/Motivation

The "Enable translation" option in admin/structure/orejime_service/settings ("Language settings" tab) becomes unchecked on save. The only way to enable translation is via admin/content/orejime_service URL.

Steps to reproduce

1. Enable module (admin/modules)
2. Add a second language - if needed (admin/config/regional/language)
3. Enable content_translation module (admin/modules)
4. Enable translation for Orejime entities (admin/config/regional/content-language)
5. Enable Orejime translation in module settings (admin/structure/orejime_service/settings, "Language settings" tab), and save