Created attachment 166515 [details]
9 Virtual Desktops but with 2 Rows, Overview failing to display them.

SUMMARY
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If there a Virtual Desktop Row has more than 1 Virtual Desktop, Overview does not display Virtual Desktops.

1 Virtual Desktops + 1 Row displays Virtual Desktops.
10 Virtual Desktops + 1 Row displays Virtual Desktops.
10 Virtual Desktops + 2 Rows does not.
10 Virtual Desktops + 10 Rows displays Virtual Desktops (vertically).
11 Virtual Desktops + 10 Rows does not.
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STEPS TO REPRODUCE
1. Go to System Settings > Window Management > Virtual Desktops and add a 3 virtual desktops using the + button. Press apply.
2. Use Meta+W shortcut to activate the Overview and note that Virtual Desktops are visible.
2. Go back to Virtual Desktop settings and use the up arrow to add 1 row. Press apply.
3. Use Meta+W to activate the Overview again.

OBSERVED RESULT
Virtual desktops are no longer visible.

EXPECTED RESULT
Virtual desktops should be visible in a single row, even if there are 2 or more rows selected (previous behavior).

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch 6.7.8-arch1-1 (64-bit)
(available in About System)
KDE Plasma Version: 6.0.1
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

ADDITIONAL INFORMATION

If row number and virtual desktop numbers match when rows are above 1, or if there are more rows than virtual desktops, the virtual desktops are displayed vertically on left side instead of horizontally above.