Molten Duplication/Worldwalker Helm Wrong Interaction
On Arena on PC to Reproduce:
- Have Worldwalker Helm in play.
- Cast Molten Duplication targeting any artifact.
The correct interaction should make a token copy of the artifact which will have haste and be sacrificed at the end of turn and a map token. For some reason, instead, the map token is created but it also has the Molten Duplication effect of haste and being sacrificed at end of turn.
Log with games featuring the interaction attached.

-
Rezzahan#77802 commented
This is not a bug, it's exactly what should happen according to the rules. All tokens created by one effect are subject to whatever that effect is subjecting the tokens to. The only thing Worldwaker Helm changes is the number and subtype of tokens created by Molten Duplication. The Helm does not create any tokens, they all come from the Duplication. And thus are all subject to Duplication's effect it its entirety.