Redux example doesn't work with mergeCells

[AMBudnik]

Description

As mentioned in our forum https://forum.handsontable.com/t/react-redux-render-with-mergecells-prop-triggers-beforechange-callback-call/3928 once we add mergeCells to the official Redux example we end up with an infinite loop.

Steps to reproduce

1. Do nothing, just check the console

Demo

https://handsontable.com/docs/7.2.2/frameworks-wrapper-for-react-redux-example.html official example
https://jsfiddle.net/AMBudnik/pftvn5qm/ the same code with mergeCells line 11

Your environment

• React wrapper version: 3.1.0
• Handsontable version: 7.2.2
• Browser Name and version: Chrome 78
• Operating System: Windows 10

[rbarato]

Hi, this happens regardless the react wrapper: https://jsfiddle.net/rbarato/9yv0om48/3/

And it looks like the changes keep growing exponentially, the more merged cells I have, the more will be added to the array. In my case I have to loop thought the changes so I can process a very specific scenario and we're having issues with a sheet that has 79 areas merged and is generating an 11k changes array which crashes the sheet.

[AMBudnik]

So this is not the same case (there's no infinite loop) but it makes the example unusable when we have many merged cells. We need to check all the scenarios while fixing.
Thank you for the feedback @rbarato

[mrpiotr-dev]

Hi @rbarato,
We merged wrapper for React into our main repository, handsontable/handsontable. Now library and wrapper are available in monorepo.
We also transfer all issues into one common issue board, where you can follow work progress and request issues.