CHECK under EMPTY_STRING_IS_NULL reports a misplaced row on partitioned table with virtual column

--source include/have_partition.inc

CREATE TABLE t1 (b BINARY GENERATED ALWAYS AS ('') VIRTUAL) PARTITION BY KEY(b) PARTITIONS 2;

INSERT INTO t1 () VALUES ();

FLUSH TABLES;

SET SQL_MODE= CONCAT(@@sql_mode,',EMPTY_STRING_IS_NULL');

CHECK TABLE t1;

# Cleanup

DROP TABLE t1;

CHECK TABLE t1;

Table	Op	Msg_type	Msg_text

test.t1	check	error	Found a misplaced row

test.t1	check	error	Partition p1 returned error

test.t1	check	error	Upgrade required. Please do "REPAIR TABLE `t1`" or dump/reload to fix it!