@strypey "are you on matrix.org or another homeserver?"

Both. It's interesting to observe room behavior when one or the other homeserver is down. It does not seem consistent with other aliases being more than just a pointer and local cache. But maybe I should rejoin matrix:matrix.org and ask the Matrix team to clarify this. (I'd read the Matrix spec, but the spec is outdated, with the current "spec" being "whatever Riot-Web and matrix.org do".)

@clacke