Straight to the point, because it is the question that brought you here: the update to BTCPay Server 2.4.4 closes the public default route to your Lightning node. It does not remove a route you built yourself. Anyone who at some point exposed their server's LND interface through their own reverse proxy therefore has two jobs: update, and take that access away again. The project behind BTCPay Server says exactly that in its announcement of September 8, 2026.