Distorted display of the Notepad ++ window
The frames of the windows are shown completely offset within Notepad ++.
It seems that this effect occurs whenever I have used remote sessions from different systems in a row. (Zoom, Teamviewer, Slack and Skype).
This is a known issue (https://github.com/notepad-plus-plus/notepad-plus-plus/issues/9717) mentioned multiple times in the forum.
Some people have had luck by rebooting, or changing to administrative mode, or updating video drivers.