Short update - I've finally got a bug filed for this: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj82736

We had the same issue and could narrow it down: It's because of a new Chromium feature TLS 1.3 hybridized Kyber support starting from Version 124, which breaks TLSv1.2 Handshake. In our case, we also had the problem, that we cannot connect with a Bro...