DocumentDb: $multiply by NumberInt(-1)

I've been working on converting mongodb pipelines to documentdb pipelines. I've posted the same question over on stackoverflow.

I've came across this oddity: I'm seeing behavior where multiplying by negative numbers is failing in AWS documentdb. This works in mongodb but the same fails in documentdb:

            "$addFields" : {
                sigh: { $multiply: [ NumberInt(-1), NumberInt(1) ] }
            }

Just to convince myself that I had the syntax correct I tested against:

            "$addFields" : {
              sigh: { $multiply: [ NumberInt(1), NumberInt(1) ] }
            }

Using -1 works in this toy query but still fails in the same way in the context of a$cond query.

            "$addFields" : {
              sigh: { $multiply: -1, NumberInt(1) ] }
            }

I thought maybe the NumberInt(-1) could be the problem but this works just fine:

            "$addFields" : {
                "sigh2": NumberInt(-1),
            }

document db engine: db.runCommand({getEngineVersion: 1}

{
    "engineVersion" : "2.0.8934",
    "ok" : 1.0,
    "operationTime" : Timestamp(1684438041, 1)
}

Finally, the error I'm seeing is:

Mongo Server error (MongoCommandException): Command failed with error 17287: 'Bad query specified' on server <instance>.docdb.amazonaws.com:27017. 

The full response is:
{
    "ok" : 0.0,
    "operationTime" : Timestamp(1684439496, 1),
    "code" : 17287.0,
    "errmsg" : "Bad query specified"
}