Hello @genweb, naveen1994, @gw808092, @angelolazzari, @lindyk, @marksas, @ericheath31, @fbarreto & @jesusdiazruiz
Thank you for contacting the support.
The issue is not coming from the Rank Math plugin.
Rank Math uses Schema.org and adds the markup using JSON-LD method. You can check the source code of your websites and you would notice that:
https://i.rankmath.com/PZxW4j
That code must be coming from the theme or one of the other plugins you are using.
You got to check the source code of your website to determine if something like this is getting added:
https://1.bp.blogspot.com/-Evqfp5OvXt4/XibNP487ZHI/AAAAAAAAD4k/xuoR555onXMURDNC1UpRnrjNBifdLRUOACLcBGAsYHQ/s640/data-vocabulary-markup.jpg
If so, then please follow this troubleshooting guide to determine the culprit:
https://rankmath.com/kb/check-plugin-conflicts/
Every time you would activate a theme or a plugin, check the source code of your website to determine who is adding that similar code.
Hope that helps.