Illegal mix of collations

[kozakp-pragmile]

I am getting exception

ErrorMessage{errorCode=1267, sqlState='HY000', errorMessage='Illegal mix of collations (utf8mb4_bin,NONE) and (utf8mb4_general_ci,COERCIBLE) for operation '=''}
when trying to perform a query with the folowing WHERE clause
WHERE concat(column1, cast(column2 as char)) = 'some-string',

The query works when using WHERE column1 = 'some-string' or WHERE cast(column2 as char) = 'some-string'.

The query works in standard SQL client using JDBC.