Body text always displays as bold on mobile pages

Site URL: https://www.tonymarzano.com

On mobile only, all body text is displaying as bold, despite not being built that way. It displays properly (not bolded) on desktop. 

Example of issue on a page: https://tonymarzano.com/peace-tea

Thanks in advance for the help.

Desktop:

Mobile:

Which mobile/browser do you use?

11 hours ago, tuanphan said:

Which mobile/browser do you use?

Chrome, looks like this problem doesn't happen in safari. Would still be nice to know a fix though.

On 9/28/2020 at 2:51 AM, tuanphan said:

Which mobile/browser do you use?

Any chance you know of the solution?