Mouse natural scroll weird behavior for volume control

natural scrolling for mouse is weird for volume control, slide-up/slide-down should naturally increase/decrease volume but it is swapped.
better for natural scrolling to not affect default behavior for volume control

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome (not installed)
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 25 23:38:26 2018
InstallationDate: Installed on 2018-09-05 (50 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: meta-gnome3
UpgradeStatus: No upgrade log present (probably fresh install)