Hi @AngieCarland,
I'm not familiar with what Loree is, but when copy/pasting text to and from Canvas, other platforms might have different fonts as their default, or completely different fonts than Canvas altogether. In a lot of cases, I'll paste without formatting (ctrl+shif+v or cmd+shift+v), which will generally use the font of the destination system, but has some downsides like removing any links, images, etc... from the content you're pasting. There isn't anything Cavas is really doing wrong here, it's basically just how things work when creating online content right now.
Hope the info helps you out a bit, even just to know what you're seeing isn't totally unusual.
-Chris