Issue with scoping rules of parameter (and variable) declaration in components (Catalyst vs ModelingToolkit)

Specific Domains Modelling & Simulations
,
1

Working with Catalyst v15.0.8 and ModelingToolkit v9.80.5,
I found a strange and misleading behavior w.r.t. parameter declarations in reaction components: suppose I declare a parameter (k) in two different components (n1 and n2) with two different default values (say 1.0 in n1 and 2.0 in n2), and in both components I also declare a variable x with k as initial condition. I would thus expect that the initial condition of n1.x is 1.0 and n2.x is 2.0. This is not the case, both variable have the same initial value! More concretely:

n1 = @network_component n1 begin
    @parameters k = 1.0
    @variables x(t) = k
end

n2 = @network_component n2 begin
    @parameters k = 2.0
    @variables x(t) = k
end

@named sys1  = System([D(n2.x) ~ 0, D(n1.x) ~ 0], t)
prob1 = ODEProblem(complete(sys1))

I get:

ODEProblem with uType Vector{Float64} and tType Nothing. In-place: true
Initialization status: FULLY_DETERMINED
Non-trivial mass matrix: false
timespan: (nothing, nothing)
u0: 2-element Vector{Float64}:
 1.0
 1.0

So both n1.x and n2.x have 1.0 as initial condition. If I swap both equations:

@named sys2  = System([D(n1.x) ~ 0, D(n2.x) ~ 0], t)
prob2 = ODEProblem(complete(sys2))

I get:

ODEProblem with uType Vector{Float64} and tType Nothing. In-place: true
Initialization status: FULLY_DETERMINED
Non-trivial mass matrix: false
timespan: (nothing, nothing)
u0: 2-element Vector{Float64}:
 2.0
 2.0

both n1.x and n2.x have now 1.0 as initial condition.

If I translate this code in ModelingToolkit as follows:

@mtkmodel Decl1 begin
    @parameters begin
        k = 1.0
    end
    @variables begin
        x(t) = k
    end
end

@mtkmodel Decl2 begin
    @parameters begin
        k = 2.0
    end
    @variables begin
        x(t) = k
    end
end

@mtkmodel Eq begin
    @components begin
        n1 = Decl1()
        n2 = Decl2()
    end
    @equations begin
        D(n2.x) ~ 0
        D(n1.x) ~ 0
    end
end

@mtkbuild sys3 = Eq()
prob3 = ODEProblem(sys3)

then I get the expected initial conditions:

ODEProblem with uType Vector{Float64} and tType Nothing. In-place: true
Initialization status: FULLY_DETERMINED
Non-trivial mass matrix: false
timespan: (nothing, nothing)
u0: 2-element Vector{Float64}:
 1.0
 2.0

Is it a bug or a feature of @reaction_component ?