Aftermath spells castable from opponent’s graveyard

[sick barn]

It’s in the title. Opponent cast Grind//Dust, and clicking on it in their grave to try to read it prompted me to pay the cost to cast Dust. Playing on 2.0.06, the Spider-Man full release.

[valid ether]

On a build from a week ago, this is working fine.

I'd agree what you're describing is perplexing: the process of casting the spell moves the card to the stack, so you aren't supposed to find it in the graveyard. Also both Grind and Dust are sorceries so you really shouldn't be able to cast them on an opponent's turn without shenanigans like [[Vedalken Orrery]] and [[Shaman's Trance]].

I'd suggest updating to a snapshot if the issue continues, https://github.com/Card-Forge/forge/releases/tag/daily-snapshots .

[mental canopy]

https://scryfall.com/card/2x2/317/vedalken-orrery

Vedalken Orrery <:mana4:292901508712890379>

Artifact
You may cast spells as though they had flash.
The model incorporated the fifth sun effortlessly, as if it had always known.