Error for batch job but not for synchronous job

[m-mohr]

I have the following process graph, which errors as a batch job but succeeds as a synchronous call:

{
  "process_graph": {
    "1": {
      "arguments": {
        "bands": [
          "NDVI_10M"
        ],
        "id": "TERRASCOPE_S2_NDVI_V2",
        "spatial_extent": {
          "east": 8.553762859556787,
          "north": 52.05423570371391,
          "south": 51.97217635109003,
          "west": 8.469544050284915
        },
        "temporal_extent": [
          "2021-01-01T00:00:00Z",
          "2022-01-31T00:00:00Z"
        ]
      },
      "process_id": "load_collection"
    },
    "2": {
      "arguments": {
        "data": {
          "from_node": "1"
        },
        "dimension": "t",
        "reducer": {
          "process_graph": {
            "1": {
              "arguments": {
                "data": {
                  "from_parameter": "data"
                }
              },
              "process_id": "mean",
              "result": true
            }
          }
        }
      },
      "process_id": "reduce_dimension"
    },
    "3": {
      "arguments": {
        "data": {
          "from_node": "2"
        },
        "name": "bands"
      },
      "process_id": "drop_dimension"
    },
    "4": {
      "arguments": {
        "data": {
          "from_node": "5"
        },
        "format": "GTIFF"
      },
      "process_id": "save_result",
      "result": true
    },
    "5": {
      "arguments": {
        "data": {
          "from_node": "3"
        },
        "projection": 3857,
        "resolution": 0
      },
      "process_id": "resample_spatial"
    }
  }
}

I can't provide an error message due to Open-EO/openeo-python-driver#101