Text size on Hand-Picked Products block

This may be GeneratePress vis-a-vis something else -

I am using the Hand-Picked Products block (part of WooCommerce) on the home page.

Until the latest WordPress and WooCommerce updates the font size on 'add to cart', 'product title', and 'price' on Hand-Picked Products were at regular size, same as I had for the individual product category pages.

Now suddenly, the font is tiny and I cannot find out what is governing it other than I see that in CSS whereas previously before the latest update the text size was 0.8em it is now 0.58em,

I could change that - but I would like to know what is interfering with what? Or maybe there is a customiser thingy I am missing.

.theme-twentytwenty .wc-block-grid.has-5-columns .wc-block-grid__product, .theme-twentytwenty .wc-block-grid.has-6-columns.alignfull .wc-block-grid__product, .wc-block-grid.has-5-columns .wc-block-grid__product, .wc-block-grid.has-6-columns.alignfull .wc-block-grid__product {
    font-size: .58em;
}

URL is https://www.flyingtwigs.com

Thanks for looking.