Wrong namespace for default array parameter value

[baggepinnen]

The following code produces an incorrectly namespaced parameter constant₊k [defaults to constant₊k2[1]]. The correct answer should be

constant₊k [defaults to k2[1]]

using ModelingToolkitStandardLibrary.Blocks
@parameters t
D = Differential(t)
function FML2(; name)
    @parameters begin
        k2[1:1] = [1.0]
    end
    systems = @named begin
        constant = Constant(k = k2[1])
    end
    @variables begin
        x(t) = 0
    end
    eqs = [
       D(x) ~ constant.output.u + k2[1]
    ]
    ODESystem(eqs, t; systems, name)
end

@named model = FML2()
ssys = structural_simplify((model))

julia> ssys = structural_simplify((model))
Model model with 1 equations
States (1):
  x(t) [defaults to 0]
Parameters (2):
  k2[1] [defaults to 1.0]
  constant₊k [defaults to constant₊k2[1]]: Constant output value of block
Incidence matrix:1×2 SparseArrays.SparseMatrixCSC{Num, Int64} with 1 stored entry:
 ⋅  ×

This error leads to subsequent

julia> prob = ODEProblem(ssys, [], (0, 10))
ERROR: ArgumentError: Any[constant₊k2[1]] are either missing from the variable map or missing from the system's states/parameters list.
Stacktrace:

The problem appears related to k2 being an array

[baggepinnen]

Might be related to #2252

[avinashresearch1]

The same issue also occurs for variable symbolic arrays: #2477

[baggepinnen]

Still a problem in ModelingToolkit v9.7.1