Builder panics cannot find parent_beacon_block_root

[ferranbt]

Logs shared by a user:

thread 'tokio-runtime-worker' panicked at crates/op-rbuilder/src/builders/flashblocks/payload.rs:827:18:
called `Option::unwrap()` on a `None` value
ts=2025-07-09T16:07:34.391183085Z level=info target=reth::cli message=Status connected_peers=6 latest_block=0
ts=2025-07-09T16:07:46.166264746Z level=info target=op_rbuilder::builders::generator message="Spawn block building job"
ts=2025-07-09T16:07:46.166434157Z level=info target=payload_builder message="New payload job created" id=0x0135588c228f5ab5 parent=0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d
ts=2025-07-09T16:07:46.168123839Z level=info target=op_rbuilder::builders::generator message="Resolve kind Earliest"

thread 'tokio-runtime-worker' panicked at crates/op-rbuilder/src/builders/flashblocks/payload.rs:827:18:
called `Option::unwrap()` on a `None` value
ts=2025-07-09T16:07:59.392137378Z level=info target=reth::cli message=Status connected_peers=6 latest_block=0
ts=2025-07-09T16:08:06.304187657Z level=info target=op_rbuilder::builders::generator message="Spawn block building job"
ts=2025-07-09T16:08:06.304337541Z level=info target=payload_builder message="New payload job created" id=0x0135588c228f5ab5 parent=0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d
ts=2025-07-09T16:08:06.305384764Z level=info target=op_rbuilder::builders::generator message="Resolve kind Earliest"

thread 'tokio-runtime-worker' panicked at crates/op-rbuilder/src/builders/flashblocks/payload.rs:827:18:
called `Option::unwrap()` on a `None` value

The builder panics due to an unwrap to get the parent_beacon_block_root from the engine API calls.

[ferranbt]

More logs of the engine api calls retrieve with tcpflow

root@op-rbuilder-copy-0:/# tcpflow -c -p -i eth0 port 8551
reportfilename: ./report.xml
tcpflow: listening on eth0
010.145.067.017.33060-010.145.065.222.08551: POST / HTTP/1.1
Host: op-rbuilder-copy-engine:8551
User-Agent: Go-http-client/1.1
Content-Length: 1274
Accept: application/json
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE3NTIwODA5NTR9.jGUpzW_NQmVzrHb5qadQ5lCRGxMqs1_xhifDe6xMDLg
Content-Type: application/json
Accept-Encoding: gzip

{"jsonrpc":"2.0","id":751,"method":"engine_forkchoiceUpdatedV1","params":[{"headBlockHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d","safeBlockHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d","finalizedBlockHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d"},{"timestamp":"0x64d6dbae","prevRandao":"0x32e4469959675ceed3d1a9f43709a8055d689d712844f820aa34dbc9f49e286c","suggestedFeeRecipient":"0x4200000000000000000000000000000000000011","transactions":["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"],"noTxPool":true,"gasLimit":"0x1c9c380"}]}
010.145.065.222.08551-010.145.067.017.33060: HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
content-length: 215
date: Wed, 09 Jul 2025 17:09:14 GMT

{"jsonrpc":"2.0","id":751,"result":{"payloadStatus":{"status":"VALID","latestValidHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d","validationError":null},"payloadId":"0x0135588c228f5ab5"}}
010.145.067.017.33060-010.145.065.222.08551: POST / HTTP/1.1
Host: op-rbuilder-copy-engine:8551
User-Agent: Go-http-client/1.1
Content-Length: 89
Accept: application/json
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE3NTIwODA5NTR9.jGUpzW_NQmVzrHb5qadQ5lCRGxMqs1_xhifDe6xMDLg
Content-Type: application/json
Accept-Encoding: gzip

{"jsonrpc":"2.0","id":752,"method":"engine_getPayloadV2","params":["0x0135588c228f5ab5"]}
010.145.067.017.44118-010.145.065.222.08551: POST / HTTP/1.1
Host: op-rbuilder-copy-engine:8551
User-Agent: Go-http-client/1.1
Content-Length: 1274
Accept: application/json
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE3NTIwODA5NzR9.jCDKNZBDHGrC42hBrSCXJNT3_HH8F7QA8QbckFJ7Axw
Content-Type: application/json
Accept-Encoding: gzip

{"jsonrpc":"2.0","id":753,"method":"engine_forkchoiceUpdatedV1","params":[{"headBlockHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d","safeBlockHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d","finalizedBlockHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d"},{"timestamp":"0x64d6dbae","prevRandao":"0x32e4469959675ceed3d1a9f43709a8055d689d712844f820aa34dbc9f49e286c","suggestedFeeRecipient":"0x4200000000000000000000000000000000000011","transactions":["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"],"noTxPool":true,"gasLimit":"0x1c9c380"}]}
010.145.065.222.08551-010.145.067.017.44118: HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
content-length: 215
date: Wed, 09 Jul 2025 17:09:34 GMT

{"jsonrpc":"2.0","id":753,"result":{"payloadStatus":{"status":"VALID","latestValidHash":"0x102de6ffb001480cc9b8b548fd05c34cd4f46ae4aa91759393db90ea0409887d","validationError":null},"payloadId":"0x0135588c228f5ab5"}}
010.145.067.017.44118-010.145.065.222.08551: POST / HTTP/1.1
Host: op-rbuilder-copy-engine:8551
User-Agent: Go-http-client/1.1
Content-Length: 89
Accept: application/json
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE3NTIwODA5NzR9.jCDKNZBDHGrC42hBrSCXJNT3_HH8F7QA8QbckFJ7Axw
Content-Type: application/json
Accept-Encoding: gzip

{"jsonrpc":"2.0","id":754,"method":"engine_getPayloadV2","params":["0x0135588c228f5ab5"]}
^Ctcpflow: terminating orderly
root@op-rbuilder-copy-0:/#