Bug 443326

Summary:	New icon not added to task manager at certain ordinal positions
Product:	[Plasma] plasmashell	Reporter:	David <david.cortes.rivera>
Component:	Task Manager and Icons-Only Task Manager widgets	Assignee:	Eike Hein <hein>
Status:	RESOLVED FIXED
Severity:	normal	CC:	nate, plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.21.5
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:	5.23
Sentry Crash Report:

Description David 2021-10-05 01:31:36 UTC

SUMMARY
If I configure the icons-only task manager to show only one row of icons, after adding a certain amount of icons (and this happens at certain fixed numbers of present icons depending on the panel size), when a new icon is added by launching an app, the icon does not show up in the panel until adding yet another more icon (from another app).

STEPS TO REPRODUCE
1. Right-click the icons-only task manager, go to 'Appearance', set 'Maximum rows = 1'.
2. Start launching many apps and watch their icons popping up in the task manager.

OBSERVED RESULT
Every time the task manager has a certain number of icons, a newly added icon will not show up until adding yet another icon.

EXPECTED RESULT
Should show all icons, always.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

Comment 1 Nate Graham 2021-10-05 18:06:08 UTC

This should be fixed in Plasma 5.23, thankfully.