Wrong command type for queries

I might found something, if I disable prepared statements is sysbench--db-ps-mode=disable I can see the right cmd_type in the pg_stat_monitor

I try to manually reproduce it and I created a prepared statement but when I execute that in the pg_stat_monitorI see the prepared statement like:

So I think if sysbench use prepared statements I should also see the prepare there..

I just verified on my end and observed the following:

1. When I manually ran Insert, update, delete, I got the following:
mydb=# Select cmd_type_text,cmd_type,left(query,20) from pg_stat_monitor where LOWER(query) like LOWER('delete%') or LOWER(query) like LOWER('insert%') or LOWER(query) like LOWER('insert%') limit 100;
cmd_type_text |cmd_type |left
DELETE |4 |DELETE FROM my_table
INSERT |3 |INSERT INTO my_table

mydb=# Select cmd_type_text,cmd_type,left(query,20) from pg_stat_monitor where query like 'UPDATE%' limit 100;
cmd_type_text |cmd_type |left
UPDATE |2 |UPDATE my_table

2. Upon executing the same sysbench:

I have verified it using 2.1.0 packages and build from sources on all supported 14 platforms. It is not reproducible on my end. However we use VMs primarily in our Release and Testing workflows, and maybe this is some behavior specific to K8/dockers.