Files and Directories with Properties ?????

Issue

• There are some files and directories with ?????? property:

drwxr-xr-x 2 filebeat filebeat 4096 Sep 24 12:12 /var/lib/filebeat/

[root]# ls -l /var/lib/filebeat/
ls: cannot access /var/lib/filebeat/cle/product/: No such file or directory
ls: cannot access /var/lib/filebeat/r: No such file or directory
ls: cannot access /var/lib/filebeat/sses/trunk/l: No such file or directory
ls: cannot access /var/lib/filebeat/unk/lib/x86_: No such file or directory
ls: cannot access /var/lib/filebeat/t: No such file or directory
ls: cannot access /Bus_Exe_1_2: No such file or directory
ls: cannot access /var/lib/filebeat/unk/scripts_: No such file or directory
ls: cannot access /var/lib/filebeat/unk/lib/tls: No such file or directory
ls: cannot access /var/lib/filebeat/sses/trunk/s: No such file or directory

• Listing files/directories under /var/lib/filebeat is showing "No such file or directory". Listing files under /var/log is working without any issues.