Hello,
Thank you for contacting Rank Math and sorry for any inconvenience caused.
Please check if you have added the FAQ Schema in the Schema Generator.
Go to the Schema Generator and delete the FAQ Schema from there:

That should fix the issue.
Let us know how it goes.
We are here to assist you.
You check the image clearly:

I’m using this:

Hello,
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Looking forward to helping you.
Thank you.