In the KDE Plasma 5 Panel resides the Task Manager
In the Task Manager, icons for running programs appear.
When LibreOffice (version: 126.96.36.199; Build ID: 2b840030fec2aae0fd2658d8d4f9548af4e3518d) is running, a generic X-application icon appears in the Task Manager instead of the icon for the component of LibreOffice (such as Writer, Calc, Impress, etc.) that is running.
When the component program of LibreOffice is starting up, the appropriate icon appears in the Task Manager for about ½ a second. But that icon disappears and the generic X-icon application replaces it.
Steps to Reproduce:
1. Turn on computer
2. Log in to user account
3. Run (any component) of LibreOffice (Start Center, Writer, Impress, Calc, Base, etc.)
A generic X-application icon represents the running component of LibreOffice in the Task Manager on the main Panel.
A LibreOffice component-program's icon should represent the running component of LibreOffice in the Task Manager on the main Panel.
User Profile Reset: Yes
Build ID: 2b840030fec2aae0fd2658d8d4f9548af4e3518d
CPU threads: 4; OS: Linux 5.0; UI render: default; VCL: kde5;
Locale: en-US (en_US.UTF-8); UI-Language: en-US
I'm not sure where to answer your question. This may be the wrong spot. Forgive me, I'm not a techie.
I use a distro called PCLinuxOS (2019.03). To my knowledge, there's no official distro release level, but March 2019 was the most recent date that a new ISO was made available ... and I did do a clean install from that ISO. Note that the same problem I'm having now with the icons was also present before the clean install.
This sounds very much like bug 104235, which has been fixed for LibreOffice 6.2.3.
I'm therefore closing this bug report as a duplicate. Should the issue still occur with LibreOffice 6.2.3 or newer, please reopen.
*** This bug has been marked as a duplicate of bug 104235 ***