I am trying to write a function that allows me to render table-like structures so users can input matrices. However, when I use a matrix as a reactive variable for the structure backend the table does not behave as it should. When the user changes a field of the matrix, random other fields change their values. When I instead use 3 vectors, the problem disappears. Therefore I believe this is a bug in the Symbol() function when it needs to handle more than 1 index. Can anyone confirm this? Is there perhaps a better way to achieve matrix input using Genie?

Below the code needed to reproduce the issue.

```
module wwwef
# set up Genie development environment
using GenieFramework
@genietools
# add reactive code to make the UI interactive
@app begin
@in velocity_gradient = zeros(Float64, 3,3)
end
function generate_tensor_input_field(model)
table([
row([
numberfield("xx",Symbol(model * "[1,1]"))
numberfield("xy",Symbol(model * "[1,2]"))
numberfield("xz",Symbol(model * "[1,3]"))
])
row([
numberfield("yx",Symbol(model * "[2,1]"))
numberfield("yy",Symbol(model * "[2,2]"))
numberfield("yz",Symbol(model * "[2,3]"))
])
row([
numberfield("zx",Symbol(model * "[3,1]"))
numberfield("zy",Symbol(model * "[3,2]"))
numberfield("zz",Symbol(model * "[3,3]"))
])
])
end
function test()
[
generate_tensor_input_field("velocity_gradient")
]
end
# register a new route and the page that will be
# loaded on access
@page("/test", test)
end
~
```