rpl.rpl_delayed_parallel_slave_sbm sometimes fails with Seconds_Behind_Master should not have used second transaction timestamp

rpl.rpl_delayed_parallel_slave_sbm 'row' w3 [ fail ]

        Test ended at 2023-02-07 10:31:30

CURRENT_TEST: rpl.rpl_delayed_parallel_slave_sbm

mysqltest: At line 102: Seconds_Behind_Master should not have used second transaction timestamp

The result from queries just before the failure was:

< snip >

connection slave;

UNLOCK TABLES;

include/sync_with_master_gtid.inc

#

# Pt 2) If the SQL thread has not entered an idle state, ensure

# following events do not update SBM

# Stop slave IO thread so it receives both events together on restart

connection slave;

include/stop_slave_io.inc

connection master;

# Sleep 2 to allow a buffer between events for SBM check

insert into t1 values (1);

# Sleep 3 to create gap between events

insert into t1 values (2);

connection slave;

LOCK TABLES t1 WRITE;

START SLAVE IO_THREAD;

# Wait for first transaction to complete SQL delay and begin execution..

# Validate SBM calculation doesn't use the second transaction because SQL thread shouldn't have gone idle..

# SBM 0 was more recent than time since last transaction (1 seconds)