desktop environment resumes badly when resuming from suspend mode

[Marco]

I've a problem when resuming from suspend mode and try to unlock my pc.

Expected Behavior:

Interface shows correctly after resuming from suspend mode.

Real Behavior:

Interface shows badly after resume PC from suspend.
unlock interface doesn't shows at all; instead of it, desktop (or last application) is shown.

Have to re-suspend PC and re-resume, so the unlock interface is showed but application's bar shows like pc is still locked, so it doesn't show real opened applications.

"resize and move windows" shortcuts doesn't work either.

How to reproduce bug:

Go to suspend mode, resume. mostly the bug doesn't appear, but sometimes yes.

Distro Description: Ubuntu 18.10

  Installed: 3.30.1-1ubuntu5
  Candidate: 3.30.1-1ubuntu5
  Version Table:
 *** 3.30.1-1ubuntu5 500
        500 http://it.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gdm3 3.30.1-1ubuntu5
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Dec 5 20:16:03 2018
InstallationDate: Installed on 2017-10-21 (410 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: Upgraded to cosmic on 2018-10-20 (46 days ago)
mtime.conffile..etc.gdm3.Init.Default: 2017-11-21T14:48:20.846402
mtime.conffile..etc.gdm3.custom.conf: 2018-10-20T16:29:04.442996

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Are you using any gnome-shell extensions? If so, could you try uninstalling them and tell us if the problem persists?

[Marco (dolland)]

Yes, I'm using some extensions. I'll try to deactivate them all and report if issue exists anymore.

[Launchpad Janitor (janitor)]

[Expired for gdm3 (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]