Вот так вот ответили в в службе поддержки :

A bug: SQLite only understands upper/lower case for 7-bit Latin characters.
Hence the LIKE operator is case sensitive for 8-bit iso8859 characters or UTF-8 characters.
For example, the expression 'a' LIKE 'A' is TRUE but 'ф' LIKE 'Ф' is FALSE