subscription tracked returns a 3-tuple to frontend instead of object

I am using

tracked

tracked

tracked

for await (const [eventData] of iterable) {
    yield tracked(eventData.jobId, eventData);
  }

for await (const [eventData] of iterable) {
    yield tracked(eventData.jobId, eventData);
  }

for await (const [eventData] of iterable) {
    yield tracked(eventData.jobId, eventData);
  }

for await (const [eventData] of iterable) {
    yield tracked(eventData.jobId, eventData);
  }

It's properly typed on both frontend and backend, eg:

{
    id: string;
    data: someObject;
}

{
    id: string;
    data: someObject;
}

{
    id: string;
    data: someObject;
}

{
    id: string;
    data: someObject;
}

however what I actually receive on frontend is an 3-tuple [id, data, null].

I tried this both on versions

"11.0.0-rc.666"

"11.0.0-rc.666"

"11.0.0-rc.666"

"11.0.0-rc.666" and

next

next

next

next and got the same results.

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