Preview is not consistent with the official website

[Mutuduxf]

vscode : 1.68.1

when I copied the content on the "Create UML diagrams online in seconds, no special tools needed." like this:

// {type: class}

// Chain elements like this
[Customer]<>-orders*>[Order]++-0..*>[LineItem]

// Add notes
[Order]-[note: Aggregate Root ala DDD]

// Add more detail
[≪IDisposable≫;Customer|+forname: string;+surname: string;-password: string|login(user,pass)]

the preview is :