For those affected, can you ran the command ls -lahn /var/discourse/shared/standalone/ | grep -E "postgres|redis" and let me know if the output differs from the one below?
drwxr-xr-x 2 101 104 4.0K Aug 29 01:33 postgres_backup
drwx------ 19 101 104 4.0K Aug 29 01:42 postgres_data
drwxrwxr-x 3 101 104 4.0K Aug 29 01:42 postgres_run
drwxr-xr-x 2 103 106 4.0K Aug 29 01:38 redis_data