Plantuml do not support two flow in one diagram

[chenzz]

Plantuml do not support two flow in one diagram, while mermaid support.

Could you please support this?

minimalist example as follows,

• mermaid

sequenceDiagram
    
    note over Leader: dispatch task
    activate Leader
    Leader ->> +Worker: do something
    Worker ->> -Leader: ok
    deactivate Leader
    
    note over Worker: report status
    activate Worker
    Worker ->> +Leader: task finished
    Leader ->> -Worker: ok
    deactivate Worker

Loading

• plantuml

@startuml
    note over Leader: dispatch task
    activate Leader
    Leader -> Worker++: do something
    Worker -> Leader--: ok
    deactivate Leader

    note over Worker: report status
    activate Worker
    Worker -> Leader++: task finished
    Leader -> Worker--: ok
    deactivate Worker
@enduml

[The-Lum]

Hello @chenzz,

A possible workaround (Thanks to @SergeWenger) is to add, just after the note:
Worker -[hidden]> Worker

@startuml
    note over Leader: dispatch task
    Leader -[hidden]> Leader
    activate Leader
    Leader -> Worker++: do something
    Worker -> Leader--: ok
    deactivate Leader

 
    note over Worker: report status
    Worker  -[hidden]> Worker
    activate Worker
    Worker -> Leader++: task finished
    Leader -> Worker--: ok
    deactivate Worker
@enduml

See similar issues/requests here:

• https://forum.plantuml.net/11017/activate-deactivate-already-done-error-in-sequence-diagram
• https://forum.plantuml.net/8904/allow-activate-command-right-after-deactivate
• https://forum.plantuml.net/2775/activate-multiple-times