Currently, the problem occurs only with the e-mail field. Field with an e-mail test@TEST.com, it is not possible to find it via test@test.com

Steps to reproduce

1. Install Ibexa DXP/eZ Platform with DB PostgreSQL
2. Create a new CT with ezemail field
3. Create a new Content and enter test@TEST.com into ezemail field
4. Publish
5. Try to search test@TEST.com

Result

No results found for "test@TEST.com". Only when entering test@test.com content is found.

Expected result

Regardless of case sensitivity, content should be searched correctly.