Looking at this a little further, I have found this person has a similar issue. https://github.com/woocommerce/woocommerce-paypal-payments/issues/1242
The fix that user seemed to have done was to add a filter hook to find “Payment for order” in functions.php but I’m not particulary keen to do this.
Is it right to say its related to a Paypal plugin? not woocommerce?
