Public bug reported:

The problem is that a stray "B" character is being printed to the
terminal screen after switching work spaces with the Ctrl+Alt+{Up/Down
arrows}.

On the first workspace, I have a few applications running (Firefox is focused)
On the second workspace I have gnome terminal 3.35.91 running in full screen 
(F11, so no window boarder) running.

I Ctrl+Alt+Up Arrow to switch to the first workspace and do some things
in FF and then Ctrl+Alt+Down Arrow to switch back to the second
workspace and now see a "B" on the command line.

This happens over and over.. I see the capital B on the commandline when
I switch to this workspace where the terminal is fullscreened.

Some things to note about when this happens:
* This only happens with wayland
* It happens fairly often but not 100% of the time
* The key character created is always a "B"
* I've only seen this key character be created on gnome-terminal
* There are no journalctl logs generated when this occurs
* I have to release the Ctrl+Alt+Up and then do Ctrl+Alt+Down to see the B. (If 
I keep Ctrl+Alt pressed and then do Up and Down, the B is not generated)
* It seems more likely to happen if the first workspace is switched to, spend 
some time there just clicking things or typing or whatever, and then go back to 
the second workspace
* It only happens if gnome-terminal is full screen'd with F11

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.35.91-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu18
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Mar  4 17:24:36 2020
DisplayManager: gdm3
InstallationDate: Installed on 2019-09-13 (172 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: mutter-common 3.35.91-1ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to focal on 2020-02-28 (4 days ago)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal wayland-session

** Description changed:

- The problem is that a stray character is being printed to the terminal
- screen after switching work spaces with the Ctrl+Alt+{Up/Down arrows}.
+ The problem is that a stray "B" character is being printed to the
+ terminal screen after switching work spaces with the Ctrl+Alt+{Up/Down
+ arrows}.
  
  On the first workspace, I have a few applications running (Firefox is focused)
  On the second workspace I have gnome terminal 3.35.91 running in full screen 
(F11, so no window boarder) running.
  
  I Ctrl+Alt+Up Arrow to switch to the first workspace and do some things
  in FF and then Ctrl+Alt+Down Arrow to switch back to the second
  workspace and now see a "B" on the command line.
  
  This happens over and over.. I see the capital B on the commandline when
  I switch to this workspace where the terminal is fullscreened.
  
  Some things to note about when this happens:
  * This only happens with wayland
  * It happens fairly often but not 100% of the time
  * The key character created is always a "B"
  * I've only seen this key character be created on gnome-terminal
  * There are no journalctl logs generated when this occurs
  * I have to release the Ctrl+Alt+Up and then do Ctrl+Alt+Down to see the B. 
(If I keep Ctrl+Alt pressed and then do Up and Down, the B is not generated)
  * It seems more likely to happen if the first workspace is switched to, spend 
some time there just clicking things or typing or whatever, and then go back to 
the second workspace
  * It only happens if gnome-terminal is full screen'd with F11
  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: gnome-shell 3.35.91-1ubuntu2
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  Uname: Linux 5.4.0-14-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu18
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Mar  4 17:24:36 2020
  DisplayManager: gdm3
  InstallationDate: Installed on 2019-09-13 (172 days ago)
  InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  ProcEnviron:
-  TERM=screen
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=screen
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  RelatedPackageVersions: mutter-common 3.35.91-1ubuntu1
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to focal on 2020-02-28 (4 days ago)

** Summary changed:

- Stray B being printed on workspace after using key bindings to switch between 
workspaces
+ Stray B being printed after switching workspaces with wayland

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https://bugs.launchpad.net/bugs/1866094

Title:
  Stray B being printed after switching workspaces with wayland

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