no window shadows after maximizing with double click and dragging down window to restore

[Nikola Kovacs]

If I maximize a window by double clicking the title bar, then drag it down to restore it, the shadows are gone (see screenshot).
The only way to restore them is to maximize the window again, and then restore it by double clicking the title bar.

This does not happen if I maximize the window by dragging it to the top of the screen and then drag it down, nor does it happen if I use double clicking on the title bar to minimize it, no matter how I maximized it.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: mutter 3.16.4-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Nov 22 21:13:07 2015
InstallationDate: Installed on 2014-03-31 (600 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 15.10 (wily) reached end-of-life on July 28, 2016.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.