We improved our handling of ISO-8859-1 responses 4 days ago. Once this fix is out on Wednesday, can you please try to upgrade, and also set the Content-Type to include charset=latin1 on your requests we well?
We might still need to update a few other nodes to make them all respect the response encoding. So if this is about a specific node, please let us know, and we’ll try to prioritize updating that node’s response handling.