LeakSanitizer: detected memory leaks after insert with xmltype

CREATE TABLE t1(a XMLTYPE);

SET @x = CONCAT(  REPEAT('<element_with_long_name>', 30), 'leaf',  REPEAT('</element_with_long_name>', 30));

SELECT LENGTH(@x);

INSERT INTO t1 VALUES(@x);

DROP TABLE t1;

***Warnings generated in error logs during shutdown after running tests: main.1_my

Warning: Internal memory accounting error of 1224 bytes

==2166595==ERROR: LeakSanitizer: detected memory leaks

SUMMARY: AddressSanitizer: 1224 byte(s) leaked in 1 allocation(s).