Why "hidden" link is not honoured in this diagram?

Question

I have a diagram where I have several parallel never-ending tasks; I tried the following to hide the "partial arrow":

@startuml
start
fork
    while (loop forever)
        :Button poll;
        if (pressed) then
            :debounce;
        else
            if (was_pressed)
                if (duration > 2s)
                    if (duration > 8s)
                        if (duration < 10s)
                            :generate long press;
                        endif
                    else
                        :generate short press;
                    endif
                endif
            endif
        endif
    endwhile
    -[hidden]->
    detach

fork again
    while (loop forever)
        : wait for press;
        : handle press;
    endwhile
    -[hidden]->
    detach
    
fork again
    : Bluetooth handling;
    detach

fork again
    : Battery charger;
    detach

fork again
    : Battery monitor;
    detach

@enduml

but apparently this is not honored.

What am I doing wrong?

Comments

I agree that the trick to detach and hide to make an infinite while loop doesn't work inside a fork.  Here is a comparison of the two:

without fork - OK	with fork - KO
@startuml while (loop forever) :Step 2; endwhile -[hidden]-> detach @enduml	@startuml fork while (loop forever) :Step 2; endwhile -[hidden]-> detach end fork @enduml

And here's another example using colour instead of detach/hidden:

without fork - OK	with fork - KO
@startuml while (loop forever)    :Step 2;   endwhile   -[#blue]-> blue;   :A;   -[#green]-> green;   :B; @enduml	@startuml fork while (loop forever) :Step 2; endwhile -[#blue]-> blue; :A; -[#green]-> green; :B; end fork @enduml

---

Thanks Martin.

I assume this means we should change from "Question / help" to "Bug", right?

Is there any workaround?

Having several parallel never-ending tasks is not "uncommon" ;)