Issue running Trotter-Suzuki example

Dear ITensors developers, I hope you are doing well!

I ran into an issue with one of the examples trotter_suzuki_decomposition.py.

$ julia trotter_suzuki_decomposition.jl 
ERROR: LoadError: You are trying to add an ITensor with indices:

((dim=2|id=657|"S=1/2,Site,n=2")', (dim=2|id=657|"S=1/2,Site,n=2"), (dim=2|id=902|"S=1/2,Site,n=3")', (dim=2|id=902|"S=1/2,Site,n=3"))

into an ITensor with indices:

((dim=2|id=640|"S=1/2,Site,n=1")', (dim=2|id=640|"S=1/2,Site,n=1"), (dim=2|id=657|"S=1/2,Site,n=2")', (dim=2|id=657|"S=1/2,Site,n=2"))

but the indices are not permutations of each other.

Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:35
  [2] _map!!(f::Function, R::NDTensors.DenseTensor{Float64, 4, NTuple{4, Index{Int64}}, NDTensors.Dense{Float64, Vector{Float64}}}, T1::NDTensors.DenseTensor{Float64, 4, NTuple{4, Index{Int64}}, NDTensors.Dense{Float64, Vector{Float64}}}, T2::NDTensors.DenseTensor{Float64, 4, NTuple{4, Index{Int64}}, NDTensors.Dense{Float64, Vector{Float64}}})
    @ ITensors ~/.julia/packages/ITensors/GkEpm/src/itensor.jl:1884
  [3] map!(f::Function, R::ITensor, T1::ITensor, T2::ITensor)
    @ ITensors ~/.julia/packages/ITensors/GkEpm/src/itensor.jl:1910
  [4] copyto!
    @ ~/.julia/packages/ITensors/GkEpm/src/broadcast.jl:310 [inlined]
  [5] materialize!
    @ ./broadcast.jl:878 [inlined]
  [6] materialize!
    @ ./broadcast.jl:875 [inlined]
  [7] _add(A::NDTensors.DenseTensor{Float64, 4, NTuple{4, Index{Int64}}, NDTensors.Dense{Float64, Vector{Float64}}}, B::NDTensors.DenseTensor{Float64, 4, NTuple{4, Index{Int64}}, NDTensors.Dense{Float64, Vector{Float64}}})
    @ ITensors ~/.julia/packages/ITensors/GkEpm/src/itensor.jl:1806
  [8] +(A::ITensor, B::ITensor)
    @ ITensors ~/.julia/packages/ITensors/GkEpm/src/itensor.jl:1814
  [9] ITensor(o::Sum{Scaled{Float64, Prod{Op}}}, s::Vector{Index{Int64}})
    @ ITensors.ITensorsOpsExt ~/.julia/packages/ITensors/GkEpm/src/lib/ITensorsOpsExt/src/ITensorsOpsExt.jl:41
 [10] main(N::Int64; nsteps::Int64, order::Int64)
    @ Main ~/trotter_suzuki_decomposition.jl:20
 [11] macro expansion
    @ show.jl:1229 [inlined]
 [12] top-level scope
    @ ~/trotter_suzuki_decomposition.jl:27
in expression starting at /home/nktastr_google_com/trotter_suzuki_decomposition.jl:27

Do you have an idea what could have gone wrong? Using the CUDA.jl backend. Thank you very much!

The report identifies the trotter_suzuki_decomposition.jl example and a failure at line 20 while using the CUDA.jl backend. Start by reproducing the example with that backend and inspect the index mismatch in the stack trace; done means the example runs without the ITensor index error.