rpl.rpl_start_alter_restart_slave sometimes fails in BB with result length mismatch

rpl.rpl_start_alter_restart_slave 'innodb,stmt' w1 [ fail ]

        Test ended at 2023-01-11 17:44:02

CURRENT_TEST: rpl.rpl_start_alter_restart_slave

--- /home/buildbot/aarch64-ubuntu-2004-debug/build/mysql-test/suite/rpl/r/rpl_start_alter_restart_slave.result	2023-01-11 17:33:41.000000000 +0000

+++ /home/buildbot/aarch64-ubuntu-2004-debug/build/mysql-test/suite/rpl/r/rpl_start_alter_restart_slave.reject	2023-01-11 17:44:02.028287464 +0000

@@ -72,11 +72,9 @@

 slave-bin.000001	#	Query	1	#	use `test`; alter table <t> add column c int

 slave-bin.000001	#	Gtid	1	#	GTID #-#-# START ALTER

 slave-bin.000001	#	Query	1	#	use `test`; alter table <t> add column c int

-slave-bin.000001	#	Gtid	1	#	GTID #-#-# COMMIT ALTER id=<seq_no>

-slave-bin.000001	#	Query	1	#	use `test`; alter table <t> add column c int

 select domain_id, seq_no from mysql.gtid_slave_pos order by seq_no desc limit 1;

 domain_id	seq_no

-0	5

+0	4

 include/start_slave.inc

 connection master;

 connection slave;

mysqltest: Result length mismatch