Failed to collect receipts in exchange for an on-chain query fee voucher

I've been seeing the following (along with 6 other allocation ID's) every time I start up the indexer-agent container where it appears the agent is having issues collecting receipts for certain allocations:

{
  "level": 30,
  "time": 1626348829631,
  "pid": 1,
  "hostname": "5f1eb7ae2d18",
  "name": "IndexerAgent",
  "component": "AllocationReceiptCollector",
  "allocation": "0x77a99255419C67884A22f47fa599700E0913b46C",
  "receipts": 616,
  "msg": "Collect receipts for allocation"
}
{
  "level": 50,
  "time": 1626348830322,
  "pid": 1,
  "hostname": "5f1eb7ae2d18",
  "name": "IndexerAgent",
  "component": "AllocationReceiptCollector",
  "allocation": "0x77a99255419C67884A22f47fa599700E0913b46C",
  "err": {
    "type": "IndexerError",
    "message": "Failed to collect receipts in exchange for query fee voucher",
    "stack": "IndexerError: Failed to collect receipts in exchange for query fee voucher\n    at Object.indexerError (/opt/indexer/packages/indexer-common/dist/errors.js:139:12)\n    at AllocationReceiptCollector.<anonymous> (/opt/indexer/packages/indexer-agent/dist/query-fees/allocations.js:205:130)\n    at Generator.throw (<anonymous>)\n    at rejected (/opt/indexer/packages/indexer-agent/dist/query-fees/allocations.js:6:65)\n    at processTicksAndRejections (internal/process/task_queues.js:97:5)",
    "code": "IE054",
    "explanation": "https://github.com/graphprotocol/indexer/blob/master/docs/errors.md#ie054",
    "cause": {
      "message": "Request failed with status code 500",
      "stack": "Error: Request failed with status code 500\n    at createError (/opt/indexer/node_modules/axios/lib/core/createError.js:16:15)\n    at settle (/opt/indexer/node_modules/axios/lib/core/settle.js:17:12)\n    at IncomingMessage.handleStreamEnd (/opt/indexer/node_modules/axios/lib/adapters/http.js:260:11)\n    at IncomingMessage.emit (events.js:333:22)\n    at IncomingMessage.EventEmitter.emit (domain.js:482:12)\n    at endReadableNT (_stream_readable.js:1204:12)\n    at processTicksAndRejections (internal/process/task_queues.js:84:21)",
      "config": {
        "url": "https://gateway.network.thegraph.com/collect-receipts",
        "method": "post",
        "data": {},
        "headers": {
          "Accept": "application/json, text/plain, */*",
          "Content-Type": "application/octet-stream",
          "User-Agent": "axios/0.21.1",
          "Content-Length": 69012
        },
        "transformRequest": [
          null
        ],
        "transformResponse": [
          null
        ],
        "timeout": 0,
        "xsrfCookieName": "XSRF-TOKEN",
        "xsrfHeaderName": "X-XSRF-TOKEN",
        "maxContentLength": -1,
        "maxBodyLength": -1
      }
    }
  },
  "msg": "Failed to collect receipts in exchange for an on-chain query fee voucher"
}

I'm running in a docker-compose environment with the following:

graphprotocol/graph-node:v0.23.1
ghcr.io/graphprotocol/indexer-agent:v0.16.0
ghcr.io/graphprotocol/indexer-service:v0.16.0

I have the following set in the indexer-agent:

INDEXER_AGENT_COLLECT_RECEIPTS_ENDPOINT: https://gateway.network.thegraph.com/collect-receipts
INDEXER_AGENT_ALLOCATION_CLAIM_THRESHOLD: 1