#StackBounty: #kubuntu Can't identify app

Bounty: 50

I try to identify source of window that freeze, but without luck :

[andrii@andrii-Aspire-A517-51G ~]$ xprop | awk -F'=' '/_NET_WM_PID/ {print $2}' | xargs ps
    PID TTY          TIME CMD
   8434 pts/0    00:00:00 bash
 967972 pts/0    00:00:00 xargs
 967991 pts/0    00:00:00 ps
[andrii@andrii-Aspire-A517-51G ~]$ xprop | awk -F'=' '/_NET_WM_PID/ {print $2}' 

[andrii@andrii-Aspire-A517-51G ~]$ 

app

Also, this ^ app skip taskbar.

enter image description here

cat /etc/os-release

NAME="Ubuntu"
VERSION="20.04.2 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.2 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
wmctrl -l -p -x
X Error of failed request:  BadWindow (invalid Window parameter)
  Major opcode of failed request:  20 (X_GetProperty)
  Resource id in failed request:  0x6a0bec9
  Serial number of failed request:  13
  Current serial number in output stream:  13

$  wmctrl -m
Name: Openbox
Class: 
PID: N/A
Window manager's "showing the desktop" mode: OFF

$


Get this bounty!!!

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