Maybe Error Log when Paypal Checkout does not return content properly?

For a simple need we setup customer with "Paypal Checkout" and it worked adequately for a few months.

About a week ago maybe the "paypal-button-container" was empty!
While troubleshooting, we cloned the website to a sandbox with different URL, it works fine...
So we changed the site apache settings with redirect from example.com to www.example.com and it works...
Best we can tell Paypal does not like some past history and is not filling in the container ?

As a Feature Request, could you give an error log message when PayPal does not give info to embed because they may suspect Fraudelent use ?