Created attachment 184888 [details]
expected/observed behavior

SUMMARY

On the Icons-And-Text task manager, with an specific set-up (several rows, only if there's low space), as the number of tasks grow, the expected behavior is so their width compresses from the maximum width to their minimum width, and only when this is not enough, then start a second row.
 
On master, after the scrollable changes, this behavior got unintentionally broken. Now the maximum width seems to grow with the number of items, and the second row starts at a lower number of tasks.

STEPS TO REPRODUCE
1. Use Icon-And-Text Task manager on a horizontal panel
2. Configure the number of rows as "When there's little space in the panel"
3. Start adding/removing windows("tasks")

OBSERVED RESULT
The task's max. width grows with the number of tasks represented, and the jump to two rows happens with a lower number of tasks.

EXPECTED RESULT
- When there's enough space, the tasks remain at a consistent max.width
- When the space starts to get crowded, tasks width is reduced until they reach their min.width 
- When the number of tasks * min.width is not enough, the second row appears

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 25.04
KDE Plasma Version: 6.4.80
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.1
Kernel Version: 6.14.0-29-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 16 GiB of RAM (15.3 GiB usable)
Graphics Processor: Intel® UHD Graphics 620