Sequence Diagram: Code formatting work wrong for "participant" with "as"

[TakeAsh]

When "participant" has "as" keyword, Code formatting inserts the new-line and breaks the syntax of the diagram.
This problem doesn't occur for "actor".
VSCode PlantUML 2.3.1

Before Code formatting, Preview works good.

@startuml
participant Alice
participant "The **Famous** Bob" as Bob
participant "The **Famous** Carol" as Carol
actor "The **Famous** Dave" as Dave

Alice -> Bob : hello --there--
... Some ~~long delay~~ ...
Bob -> Alice : ok
note left
  This is **bold**
  This is //italics//
  This is ""monospaced""
  This is --stroked--
  This is __underlined__
  This is ~~waved~~
end note

Alice -> Bob : A //well formatted// message
note right of Alice 
 This is <back:cadetblue><size:18>displayed</size></back> 
 __left of__ Alice. 
end note
note left of Bob 
 <u:red>This</u> is <color #118888>displayed</color> 
 **<color purple>left of</color> <s:red>Alice</strike> Bob**. 
end note
note over Alice, Bob
 <w:#FF33FF>This is hosted</w> by <img sourceforge.jpg>
end note 
@enduml

After Code formatting, Preview doesn't work.

@startuml
participant Alice
  participant
    "The **Famous** Bob" as Bob
    participant
      "The **Famous** Carol" as Carol
      actor "The **Famous** Dave" as Dave

      Alice -> Bob : hello --there--
      ... Some ~~long delay~~ ...
      Bob -> Alice : ok
      note left
        This is **bold**
        This is //italics//
        This is ""monospaced""
        This is --stroked--
        This is __underlined__
        This is ~~waved~~
      end note

      Alice -> Bob : A //well formatted// message
      note right of Alice
        This is <back:cadetblue><size:18>displayed</size></back>
        __left of__ Alice.
      end note
      note left of Bob
        <u:red>This</u> is <color #118888>displayed</color>
        **<color purple>left of</color> <s:red>Alice</strike> Bob**.
      end note
      note over Alice, Bob
      <w:#FF33FF>This is hosted</w> by <img sourceforge.jpg>
      end note
      @enduml

I got the error message in the diagram renderer: