Nameless Seer disappeared

I encountered the "Nameless Seer" in a mirage on the "Vaal Temple" map and
connected it to the "Town Square" map. After relogging into the game,
the map's divination mechanic disappeared.
There's no longer a connection on the atlas.

Same thing happened to me, found Nameless Seer in a mirage and connected maps. Later after relogging into the game connection wasn't there.