Insert of emoji in a column with collation utf8mb4 doesn't work

org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [INSERT INTO mytable (id, field1, field2, field3) VALUES (?, ?, ?, ?)]; SQL state [HY000]; error code [1366]; Incorrect string value: '\xF0\x9F\x98\x84"}' for column 'field3' at row 1; nested exception is java.sql.SQLException: Incorrect string value: '\xF0\x9F\x98\x84"}' for column 'field3' at row 1

(...)

Caused by: java.sql.SQLException: Incorrect string value: '\xF0\x9F\x98\x84"}' for column 'payload' at row 1

	at org.mariadb.jdbc.internal.SQLExceptionMapper.get(SQLExceptionMapper.java:149)

	at org.mariadb.jdbc.internal.SQLExceptionMapper.throwException(SQLExceptionMapper.java:106)

	at org.mariadb.jdbc.MySQLStatement.executeQueryEpilog(MySQLStatement.java:264)

	at org.mariadb.jdbc.MySQLStatement.execute(MySQLStatement.java:288)

	at org.mariadb.jdbc.MySQLStatement.executeUpdate(MySQLStatement.java:317)

	at org.mariadb.jdbc.MySQLPreparedStatement.executeUpdate(MySQLPreparedStatement.java:156)

	at org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:916)

	at org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:909)

	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:644)

	... 78 more

Caused by: org.mariadb.jdbc.internal.common.QueryException: Incorrect string value: '\xF0\x9F\x98\x84"}' for column 'payload' at row 1

	at org.mariadb.jdbc.internal.mysql.MySQLProtocol.getResult(MySQLProtocol.java:942)

	at org.mariadb.jdbc.internal.mysql.MySQLProtocol.executeQuery(MySQLProtocol.java:991)

	at org.mariadb.jdbc.MySQLStatement.execute(MySQLStatement.java:281)

	... 83 more

jdbc:mysql://127.0.0.1:3306/mydatabase?useUnicode=yes&useConfigs=maxPerformance\

flozano:/etc$ cat my.cnf

[mysqld]

character-set-server=utf8mb4

`field3` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci