incorrect statistics in nautilus

I'm using UBUNTU 18.04
I have a directory with 23 sub directories and 24000 files and 93GB used.
below is the output of df -h
/dev/sda9 119G 89G 25G 79% /Cabs

When i go and high light the 23 sub directories and get a total of the sub directories
thru properties, it seem to loop an it goes thru each directory.
I end up getting some value like 4000 and 24 GB.
If i do the same thing on a NAS attached file system, it never stops.
I get similar results in 19.04

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nautilus 1:3.26.4-0~ubuntu18.04.4
ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18
Uname: Linux 4.15.0-48-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed May 1 20:31:06 2019
GsettingsChanges:
 b'org.gnome.nautilus.window-state' b'sidebar-width' b'196'
 b'org.gnome.nautilus.window-state' b'geometry' b"'650x567+37+120'"
InstallationDate: Installed on 2019-04-22 (9 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_nautilus: