Mermaid sequenceDiagram doesn't render when using Critical Region

[techuila]

So I was trying out mermaid diagrams on GitHub, and all of it works until I tried using Critical Regions for sequenceDiagram.

Mermaid sequenceDiagram

sequenceDiagram
    critical Establish a connection to the DB
        Service-->DB: connect
    option Network timeout
        Service-->Service: Log error
    option Credentials rejected
        Service-->Service: Log different error
    end

Output