Not a bug
A few days ago a bug is fixed,a default reverse proxied SSL sites setting is added, but this is not good, like I only want to use SSL in the backend, but this setting will cause all the link inside the website turn to https://, this slows down the frontend. And also, some serach engine is not friendly to SSL. So I think it's better to add this as an option, not enabled by default.
Customer support service by UserEcho