State diagrams only permit one transition to a given state using the StateIdentifier[H] syntax. The limitation to target the history pseudo-state does not exist if a more verbose <<history>> alias is defined within the target state and the state transitions are placed (1) after the target state definition and (2) target the history alias.
@startuml
[*] --> Foo
Foo --> Bar : Ev1
Foo --> a[H] : Ev2
Bar --> a[H] : Ev3
@enduml
The following much more verbose syntax does permit multiple transitions to the history state
@startuml
state a {
state history as "History" <<history>>
}
[*] --> Foo
Foo --> Bar : Ev1
Foo --> history : Ev2
Bar --> history : Ev3
@enduml
The downside to this method is that the state with history must be defined before the transitions to the history alias
