Help with Google mobile usability feedback

Hello! Google has provided mobile feedback on our site as follows:

Text too small to read
Clickable elements too close together
Content wider than screen

What I don’t understand is that there are 41 articles which apparently fail the above, but hundreds which pass - but the font on all pages is the same, the layout / clickable elements are the same and the content width is the same… as they all use the same article template.

For instance, this one fails all 3:

But this one is apparently fine:

Can anyone help me work out why there is a discrepancy?

Here is my site Read-Only: LINK