I have suddenly seen the ame thing where a handful will work fine then suddenly all but Goodreads starts failing. When I look at the errors most of them seem to be "http error 429: too many requests". The main trigger seems to be:
- I search for covers and get lots of options
- I select an option I think looks good and let it load
- Once it loads, I find it is lower quality than expected, so I do the same search again and that makes most searches start getting 429 blocked
- This state persist for over 15 minutes so I end up walking away and trying again and then it is okay.
However, this is not the only trigger as some times just doing a few books in a row will also trigger it.