[Sequncer] v2.60.0 returns outdated latest block until the batch is closed.

[iszubok]

We have batch sealing time set to 30 minutes.
When launching a new network from genesis, the sequencer node returns block #1 as a response to { "id": 1, "jsonrpc": "2.0", "method": "eth_getBlockByNumber", "params": ["latest", false] } despite new blocks are produced by the sequencer (can be seen from sequencer logs). Looks like the seuqencer always returns the latest block in the latest closed batch and not the latest block in WIP batch.

Request to fix this to support small single node devnet setups without runing a separate RPC node.

[afa7789]

@iszubok, could you share config/reproduction steps?

[hexoscott]

Fixed by #1527