[Bug Report]: add() formatter not working with arrays. Issue replicated with excel template and data provided by Carbone

[menbatisiunissart]

Environment
Carbone Version: 3.2.3 (also tested with 2.1.1 with similar results)
Node Version: v16.13.0
Desktop OS: Mac Os 11.6.7 Big Sur

Expected Behaviour
Excel "dynamic paramters" example provided by carbone.id:
https://carbone.io/examples/dynamic-parameters/Archive.zip

• Render content of {d.obj.arr[0].value:add(..arr[1].total)} as correct value (25)
• Render content of {d.obj.arr[0].value:add(d.obj.arr[1].total)} as correct value (25)

Actual Behaviour
Content rendered as NaN

Steps to reproduce
Steps to reproduce the bug:

1. Go to https://carbone.io/examples/dynamic-parameters/Archive.zip
2. Run the template with the provided JSON data
3. See error

Screenshots

Also managed to replicate the same issue in Carbone studio:

Other comments

• Traced down the issue to getValueOfPath in helper.js
  Debug mode throwing the following error: [[C_ERROR]] arr[1] not defined
  

• Also tried the same template in .ods instead of excel with similar results