Can <<entryPoint>> be used in a state diagram containing concurrent state

Question

The following state diagram doesn't seem to draw concurrent states correctly

@startuml

state Sub {
state ep1 <<entryPoint>>
ep1 --> s1

}

[*] --> ep1

--

[*] --> SomewhatBroken

@enduml

The  following doesn't render at all:

@startuml

[*] --> TotallyBroken

--

state Sub {
state ep1 <<entryPoint>>
ep1 --> s1

}

[*] --> ep1

@enduml

See the output from the online server //www.plantuml.com/plantuml/png/SoWkIImgAStDuUAArefLqDMrKmZ9BqdCoQbqAihFJitZujBLvU82AYf9LGWkJLAeXh9J2mmLR6nIyqgAAWFoC_DAxEouW49W_SM6N5orSEE0Ae5yXzIy5A0b0000