Have you ever seen a situation where a https fetch never gets off the client machine, despite having firewall/AV off, and/or having FW on and inbound/outbound exceptions in place? There's nothing in the eventviewer, nothing in debugview, nothing anywhere that Ive found that is alerting on this connection attempt.
AsInvoker - cant reach out to any machine via Nettalk, but can via C++ web calls.
As admin - nettalk works fine.
This app is using a fairly current (10.15) NT10 in this case.