See the image below. If you decrease font it also affects the code editor window, making it too small.

Yes, there is currently a bug in vscode that prevents us from using the same font size as the editors. But I saw that the bug is being fixed, so hopefully, we can get rid of this problem soon.
Has this been resolved?
No. This is a tricky one.
Any updates on this nasty bug?
Actually, I spoke to some VS Code dev guys the other day, and they said they have provided what is needed to fix this. I haven't had the time to look at it yet, though. But there's hope!
Turns out there isn't a nice way to do this: https://github.com/microsoft/vscode/issues/86722
But I've sort of hacked my way around it now. Next release!
On 2.0.68, I'm seeing some strange UI behaviour where my REPL is now in what looks like the default sans-serif font rather than my monospace editor font. Any idea how I can start debugging this?
Indeed. I found where I had messed up and have fixed that in 2.0.69.
Most helpful comment
Turns out there isn't a nice way to do this: https://github.com/microsoft/vscode/issues/86722
But I've sort of hacked my way around it now. Next release!