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Can you please provide us ID of the form you are having issues with?
I have tested Visual Report on my sample form, but I was not able to replicate mentioned issue. I was able to increase and decrease Charts and Grids with our any issues. They did not get broken.
Inside of this guide you can find how to create a visual report with your form submissions:
I have also cleared the form cache on your account.
Please try to create your Visual report again and if the issue persist, provide us ID of your form.
Let us know if you need further assistance.