Another strange behavior is that spam seems to come from a oxtr.dev relay After that, I go to the relay settings - the global view is disabled there, but the most interesting thing is that the Amethyst shows zero statistics on received messages from that feed. Watch the video.
Discussion
An expected behavior is that if your relay list is taking too long to be downloaded by your relays, the app will use the default relays to give you some experience while it waits for your list.
When your list arrives, then the app replaced the default behavior with yours.
The same can happen with an old relay list of yours coming before a newer one.