Created attachment 132523 [details]
Scrolling attemp

SUMMARY

Konsole fails to update the most part of the terminal contents when scrolling with mouse wheel or touchpanel. This only happens when the scrollbar is hidden. 

In the attatchment you'll see the central part of the terminal stays fixed despite being scrolling (scrolling can be seen on the first two characters of each line). It repaints again if the window is resized.

I could git bisect this to MR https://invent.kde.org/utilities/konsole/-/merge_requests/236.

STEPS TO REPRODUCE
1. Set "Scrollbar position" to "Hidden"
2. Print something larger than the window height.
3. Scroll using mouse wheel or touchpad

OBSERVED RESULT
The terminal does not redraw the scrolled contents to its new position.

EXPECTED RESULT
Content is correctly displayed when scrolled.

SOFTWARE/OS VERSIONS
Konsole Version: 20.11.70 (master)
KDE Plasma Version: 5.20.90 (master)
KDE Frameworks Version: 5.76.0 (master)
Qt Version: 5.15.2

ADDITIONAL INFORMATION