Error, 'Activate/Deactivate already done on X', probably shouldn't be triggered if operations not in same group.

Question

In sequence diagrams, an 'activate X' at the start of a group right after a 'deactivate X' at the end for the prior group causes an error, 'Activate/Deactivate already done on X', but probably shouldn't

Here is an example where the desire is to have the activation state be displayed distinctly within each group (This would work correctly if each group were in a separate file):

@startuml
participant X
participant Y

group First
activate X
X -> Y: Some update
activate Y
Y -> Y: spawn worker
Y -->> X: notify
deactivate Y
deactivate X
end

group Second
activate X
X -> Y: request stats
activate Y
X <- Y: return stats
deactivate Y
deactivate X
ref over X, Y: First
end

@enduml

Answer 1

On newer versions of PlantUML the given code works.

Comments

It doesn't break now but it also doesn't render the second X activation in the latest version when this comment was posted.

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You are right, it doesn't work on current version 1.2018.13 et 1.2018.14beta12

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The same for PlantUML Server 20200112-2221 / version 1202000