SVector{1,SVector{1,Float64}}( SVector{1,Float64}(1.0) ) Errors

In Julia v1.6.2 with StaticArrays v1.2.12 Running

using StaticArrays
SVector{1,SVector{1,Float64}}( SVector{1,Float64}(1.0) )

produces the error

ERROR: MethodError: Cannot `convert` an object of type Float64 to an object of type SVector{1, Float64}
Closest candidates are:
  convert(::Type{SA}, ::Tuple) where SA<:StaticArray at /home/jonas/.julia/packages/StaticArrays/vxjOO/src/convert.jl:13
  convert(::Type{SVector{N, T}}, ::CartesianIndex{N}) where {N, T} at /home/jonas/.julia/packages/StaticArrays/vxjOO/src/SVector.jl:46
  convert(::Type{T}, ::LinearAlgebra.Factorization) where T<:AbstractArray at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/LinearAlgebra/src/factorization.jl:58
  ...
Stacktrace:
 [1] macro expansion
   @ ~/.julia/packages/StaticArrays/vxjOO/src/util.jl:11 [inlined]
 [2] convert_ntuple
   @ ~/.julia/packages/StaticArrays/vxjOO/src/util.jl:7 [inlined]
 [3] SVector{1, SVector{1, Float64}}(x::Tuple{Float64})
   @ StaticArrays ~/.julia/packages/StaticArrays/vxjOO/src/SArray.jl:28
 [4] SVector{1, SVector{1, Float64}}(a::SVector{1, Float64})
   @ StaticArrays ~/.julia/packages/StaticArrays/vxjOO/src/convert.jl:5
 [5] top-level scope
   @ REPL[2]:1

I'm not sure if I'm making a mistake in the construction, it works when the inner size is 2. For now I have circumvented the issue by declaring

Base.convert( ::Type{SVector{1,Float64}} , x::Float64 ) = SVector{1,Float64}( x )

A similar error occurs for trying to create a 1-element SVector containing a 1x1 SMatrix. I realize it seems a bit silly to store a single Float64 inside a nested SVector, but it's part of a more generic scheme I'm working with where the inner and/or outer sizes are usually not 1.

Reproduce the nested SVector case in Julia 1.6.2 with StaticArrays 1.2.12, then inspect src/convert.jl, src/SArray.jl, and src/util.jl where the stack trace enters conversion. Compare the one-element case with the working inner-size-two case and confirm that both nested SVector and 1x1 SMatrix construction have the intended behavior.