pg_cron do not run with special hour

I scheduled some jobs at special time, but all of them do not run. I tested many times and found the job do not run when I assgin the hour.
'20 14 * * *' do not run
'25,26,27 14 * * *' do not run
'25,26,27 * * * *' run
'26 * * * *' run
'27 * * * 3' run
'28 * 9 * *' run
'29 * 9 10 *' run
'30 14,15 * * *' do not run
'40 14-15 * * *' do not run

I think there is a bug with crontab hour.