AWS DMS Postgres to OpenSearch LOB handling

Source: postgres Target: OpenSearch

I have a text column called description in one of my postgres tables. Per the documentation, this data type is mapped to a NCLOB. Since OpenSearch does not not offer LOB support, my description is missing in my OpenSearch documents.

I tried using the mapping rule bellow, but does not seem to be doing anything

{
    "rule-type": "transformation",
    "rule-id": "3",
    "rule-name": "3",
    "rule-target": "column",
    "object-locator": {
        "schema-name": "public",
        "table-name": "jobs",
        "column-name": "description"
    },
    "rule-action": "change-data-type",
    "data-type": {
        "type": "string",
        "length": 500
    }
}

When i check the logs i see the following

Column 'description' is unsupported in table def 'public.jobs' since the LOB support is disabled 

However, i do have LOB enabled under task settings:

"TargetMetadata": {
        "ParallelApplyBufferSize": 0,
        "ParallelApplyQueuesPerThread": 0,
        "ParallelApplyThreads": 0,
        "TargetSchema": "",
        "InlineLobMaxSize": 0,
        "ParallelLoadQueuesPerThread": 0,
        "SupportLobs": true,
        "LobChunkSize": 10,
        "TaskRecoveryTableEnabled": false,
        "ParallelLoadThreads": 0,
        "BatchApplyEnabled": false,
        "FullLobMode": true,
        "LimitedSizeLobMode": false,
        "LoadMaxFileSize": 0,
        "ParallelLoadBufferSize": 0
    },

Is that transformation rule supposed to work? Or will any LOB column be skipped because OpenSearch does not have LOB support? Any way to make this work?

Thanks!