The GitKraken or any other flatpak doesn't display the icon on top of the window in the task switcher like other applications. I have attached a screenshot. It's the same for the bottom task bar too.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-48-generic 5.4.0-48.52
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: phillipsj 1317 F.... pulseaudio
CasperMD5CheckResult: skip
Date: Wed Sep 30 20:33:37 2020
InstallationDate: Installed on 2020-09-30 (0 days ago)
InstallationMedia: Ubuntu-MATE 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 138a:0017 Validity Sensors, Inc. VFS 5011 fingerprint sensor
Bus 001 Device 004: ID 04f2:b52c Chicony Electronics Co., Ltd Integrated Camera
Bus 001 Device 002: ID 1199:9079 Sierra Wireless, Inc. Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20F6006FUS
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-48-generic root=UUID=5a1e3d3b-2e79-426e-9641-1447dcd64341 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-48-generic N/A
linux-backports-modules-5.4.0-48-generic N/A
linux-firmware 1.187.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/08/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: R02ET71W (1.44 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20F6006FUS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40705 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrR02ET71W(1.44):bd05/08/2019:svnLENOVO:pn20F6006FUS:pvrThinkPadX260:rvnLENOVO:rn20F6006FUS:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X260
dmi.product.name: 20F6006FUS
dmi.product.sku: LENOVO_MT_20F6_BU_Think_FM_ThinkPad X260
dmi.product.version: ThinkPad X260
dmi.sys.vendor: LENOVO
Thank you for taking the time to report this bug and helping to make Ubuntu better.
After installing flatpak, did you restart your session or computer ?
Also could you provide the output of the following command
$ env | grep XDG_DATA_DIRS
Furthermore it looks like there isn't any screenshot attached ?