PHP misinterpreting string after receveing from frontend (Vue and Laravel) if assigned programatically

Question

This is some weird bug, but here it is:

Before send to server some variable i'm assignig it programatically on Vue, its a binded var.

So on server side i do:

value = 'R$ 92,00'

and i send it to server (PHP - Laravel) that get it via a use Illuminate\Http\Request object

That is the issue:

On server side PHP is interpreting it with an extra char, this is an real example:

I send R$ 92,00 - Total 8 chars

this is the PHP var_dump output:

array(1) {
  ["value"]=> string(9) "R$ 92,00" // How 9?
}

If i try to console.log(value.length) the exactly same var before send to the server (on frontend) i get 8 as the length.

BUT, if i try to send again, another request (just after this one), this bug simple is gone and everything works normally.

My PHP code is just a var_dump so nothing special here:

public function store(Request $request, Client $client, Order $order)
{
    if ($order->is_closed) {
        abort(403);
    }
    var_dump($request->all()); // Here i can see what is happening
...

The frontend:

First i use a method to assign the value i want, the toBRL just format the value.

payRest () {
    this.form.value = this.$helpers.toBRL(this.totalOwing)
},

After that i just make a store request to the server nothing special here:

    async store () {
      console.log(this.form.value.length)
      try {
        await this.$chimera._newPayment.fetch()
      } catch (error) {}
    },

This only happens when i assign values programatically on Vue, if i type the value everything works fine.

Chimera is just a lib to send axios request reactively, i can asure it's not the problem because i already had this issue using only axios.