annoying grid visible in document

[sven-cnrd]

Operating System and Version

Kubuntu 22.04

Distribution

flathub

Description

There is a grid running through the document area. I suspect the reason is that I am using Kubuntu 22.04 with Global Scale set to 125% in the Display Settings. If I disable the Global Scale (set to 100%) the issue disappears.
Zooming changes the grid slightly. Some lines disappear, other appear additionally. But there is no Zoom level without the annoying lines.

Steps to Reproduce

1. install latest flatpak package on Kubuntu 22.04
2. Set Global scale to 125%, reboot.
3. open any document with Notepad Next

Additional Details

[dail8859]

Duplicate of #344

A similar issue appeared on Windows. We determined it is either a Qt bug or Scintilla (which is what does the lower-level text rendering). There did not seem to be any way for Notepad Next to fix it unfortunately.