This PR goes through the Advanced step to set a custom HS, which should be more reliable and also not depend in matrix.org responding to the well-known request.
It breaks for me locally but strangely not on CI AFAICT, but as it is more robust, it is probably a good idea to do anyway.
The "Change" link doesn't seem to appear anymore on the standard registration screen, potentially having been changed in https://github.com/matrix-org/matrix-react-sdk/pull/3343.
This PR goes through the Advanced step to set a custom HS, which should be more reliable and also not depend in matrix.org responding to the well-known request.
It breaks for me locally but strangely not on CI AFAICT, but as it is more robust, it is probably a good idea to do anyway.