characters sent to window upon workspace move

[Krister Swenson]

I use hotkeys (<ctrl><alt><down> or <ctrl><alt><up>) to switch workspaces.
Since updating to Ubuntu 19.10 I have started to notice characters getting sporadically written to the open terminal when I move to a new workspace. This is limited to terminals. Strange things happen in applications that happen to have a hotkey associated with the character being sent.

Steps to reproduce (see the attached video):

1. open a session with a fresh user account.
2. open a terminal and move it down one workspace
3. open another terminal and move it down a workspace
[The top-most workspace is empty, and then the next two have a terminal, and then the lowest is empty]
4. move up and down through the workspaces by using the hotkeys. be sure to release all keys between each move.

On the fresh user account I get the characters 'A' and 'B' written to my terminals. On my own account I get the character "^[[1;7D" written to the terminal.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: gnome (not installed)
ProcVersionSignature: Ubuntu 5.3.0-23.25-generic 5.3.7
Uname: Linux 5.3.0-23-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Dec 4 16:20:14 2019
InstallationDate: Installed on 2018-01-05 (698 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: meta-gnome3
UpgradeStatus: Upgraded to eoan on 2019-11-06 (28 days ago)

[Launchpad Janitor (janitor)]

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

[Krister Swenson (thekswenson)]

I would like to comment that this bug manifests itself in many different ways, depending on the program that happens to be in focus on the desktop. Many people probably use the mouse to change desktops (yikes!), but this problem may pop up in strange ways if it's not dealt with.