On Mason, for an alias to appear on an artist's page the edit has to be accepted first. On NGS, it does not. I'm fine with that, but there should probably be some indication on the alias page that the alias is still pending of edit acceptation.

I added http://test.musicbrainz.org/edit/13876472
It appears as all the others in http://test.musicbrainz.org/artist/b10bbbfc-cf9e-42e0-be17-e2c3e1d2600d/aliases