Hey there,
It’s super cool to see that Lucid is going to support Mermaid. However it seems not working well with google doc. I used to use UML generated diagram, it can be import to google doc via Lucid add-on. It’s very convenience when I make a change in the diagram. I just need to click update image in the google lucid add-on. I hope you are aware of this issue of Mermaid and can fix it ASAP.
Thanks