Looking at the css, there's a .text-gray-600 CSS style that would cause this, and it's overridden by some other style in order to achieve the actual desired appearance. Maybe the override style isn't loading - perhaps the GP has javascript disabled?

Also not bold for me (Safari). Variable font rendering issue?

stock safari on ios

and I think the intended webfont is loaded because the font is clearly weird ish and non-standard and the text is invisible for good 2 seconds at first while it loads:)

I only use article mode in exceptional cases. I hold fly to higher standard than that.

Looks like it always has, to me.