thank you! It turned out that really there was a corruption in the main pg server which was 'virally' propagated to 1. streaming replica1. replaying wal receiver1. old backup that tried to replay the wal'sI really thought with a master and 3 backups i'd be safe.
pgsql-general by date:
Соглашаюсь с условиями обработки персональных данных