Wow, really weird, I can't reproduce it. But sorry for the bug, I will try to fix it...
Can you give-me more precision:
- if you open the Quick Guide (in the "?" section), do you see John Steed?
- Is the bug already effective at open or is it a thing that arrived after you move the window or resize it?
- Can you send-me a screenshot with an indication of the area where canvas work and where it doesn't?