There appears to be an issue either in the asyncio SSL code when upgrading a connection with start_tls or in the function _ssl__SSLSocket_read_impl, starting from OpenSSL 3.2. The following code works ...

You can clearly see that I disable the SSL verification, but I still run into the error: Exception in Discovery communication: HTTPSConnectionPool(host='cpd-ibm-cpd.apps.___.com', port=443): Max ...