Is it possible that promises are being leaked in the background that I don't get told about until it reaches a threshold? I have a setup thats working currently, and I am trying to add a new resource `aws.rds.SubnetGroup`; the preview is absolutely fine; unless I add a

parent: network

to it also, in which case it then tells me that i'm leaking ~ 1200 promises

Don't do "dependsOn" and "parent", I'm pretty sure that causes issues in most (all?) the SDKs.

How come? I am doing

parent

to structure the tree and

dependsOn

is being used to ensure the order is correct

Because parent'ing is also used for dependencies (the expectation is that a parent waits for all it's children) so parent and dependsOn causes loops in the dependency tree.

Is there any documentation on the issues this can cause?

The docs mention this leading to undefined behavior here: https://www.pulumi.com/docs/concepts/options/parent/

Ah okay so is the recommendation to only use depends on?

Yes, parent is really only intended for component resources.