It seems that the PHONE_NUMBERS_EQUAL function from SQLite no longer works once the database is switched over to SQLCipher. It's throwing the following error:
info.guardianproject.datbase.sqlcipher.SQLiteException: no such function: PHONE NUMBERS EQUAL
The code was working correctly immediately before being switched to SQLCipher.
This might be an issue with SQLCipher or an issue with an extension that doesn't interact properly with SQLCipher as opposed to SQLite.