The following bug has been logged on the website:
Bug reference: 16258
Logged by: RekGRpth
Email address: rekgrpth@gmail.com
PostgreSQL version: 12.2
Operating system: Docker alpine edge
Description:
to reproduse
psql -c "begin;select pg_notify('channel', concat_ws(' = ', 'a',
clock_timestamp()::text));commit;select pg_sleep(10);begin;select
pg_notify('channel', concat_ws(' = ', 'b',
clock_timestamp()::text));commit;select now(), clock_timestamp();"