[konsole] [Bug 506087] New: Maximized Konsole becomes smaller when creating 2nd tab

https://bugs.kde.org/show_bug.cgi?id=506087

            Bug ID: 506087
           Summary: Maximized Konsole becomes smaller when creating 2nd
                    tab
    Classification: Applications
           Product: konsole
      Version First 25.04.2
       Reported In:
          Platform: Ubuntu
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

Created attachment 182586
  --> https://bugs.kde.org/attachment.cgi?id=182586&action=edit
Screenshot

SUMMARY

I want to have the maximum screen area when running konsole. Therefore I run it
with the following settings:

Toolbars shown: none
Remove titlebar and frame: yes
Global menubar: autohide
Task manager bar: autohide
Tab bar: show when needed, on top
Screen resolution: 2560x1600

When konsole is opened it fills the full screen
When I open a second tab with CTRL+TAB the size of konsole is decreased by a
few pixel lines and the background shines through at the bottom.

STEPS TO REPRODUCE
1. Set up konsole as described above
2. Create a second tab.

OBSERVED RESULT

When I open a second tab with CTRL+TAB the size of konsole is decreased by a
few pixel lines and the background shines through at the bottom.

EXPECTED RESULT

Creating a second tab should not change the displayed size of konsole

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 25.10, 6.14.0-15-generic amd64
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.15.0
Qt Version: 6.8.3

ADDITIONAL INFORMATION

Profile
======

[Appearance]
ColorScheme=Linux
Font=DejaVu Sans Mono,16,-1,5,50,0,0,0,0,0

[General]
Name=Profile 1
Parent=FALLBACK/

[Scrolling]
HistoryMode=2

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