Julia variable disappears/changes

I have the following MWE

function f(p)
  ans = zeros(p, 2)
  return ans
end

ans = f(2)

ans

b=ans.+1.0
ans

At first, ans is correct, but the operation creating b overwrites ans.

julia> ans = f(2)
2×2 Matrix{Float64}:
 0.0  0.0
 0.0  0.0

julia> ans
2×2 Matrix{Float64}:
 0.0  0.0
 0.0  0.0

julia> b=ans.+1.0
2×2 Matrix{Float64}:
 1.0  1.0
 1.0  1.0

julia> ans
2×2 Matrix{Float64}:
 1.0  1.0
 1.0  1.0

It's a fresh install of julia 1.6.5.

The same thing happens if I just ask typeof(ans). The value of ans itself changes to the output of typeof(ans) which is a DataType.

julia> ans=f(2)
2×2 Matrix{Float64}:
 0.0  0.0
 0.0  0.0

julia> typeof(ans)
Matrix{Float64} (alias for Array{Float64, 2})

julia> typeof(ans)
DataType

Any ideas?