Close, minimize and maximize icons disappear, pannel goes completely transparent, some icons in the launcher disappear etc

Usualy after the screen wakes up, the mentioned problems happen, and I have to restart lightdm so it can be normal again.

"Close, minimize and maximize icons disappear, panel goes completely transparent, some icons in the launcher disappear etc"

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: lightdm 1.18.2-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Oct 5 16:04:25 2016
InstallationDate: Installed on 2016-09-05 (30 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)