While the Attunement Altar is a valid relay in the pattern, if the player doesn't know this (i.e. they didn't think anything or forgot about the relay in the recipe), it looks like a relay is conflicting with the altar, especially when Aevitas is not in the sky.
(Here I intentionally made it so that Aevitas wasn't in the sky so that the particles would appear)

It is in the tome, that the altar is a valid relay.