Missing 'Shipping method notice' at the Checkout Screen

Hello all.

Shopify Support has pointed me this way - I wonder if you can help with a strange browser related issue?

The ‘Shipping method notice’ (settings/languages) doesn’t appear on the checkout page when using FIREFOX (v98). It does appear when using Firefox Developer Edition, Edge and Chrome etc. Weird!

There also seems to be a style issue - the text on the cart buttons also changes?

This issue has only just started happening in the last few days.

Any thoughts or suggestions most welcome!

Thanks in advance,

Paul.