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The bundle was executed in the parent block's own environment and the inclusion range was checked against the parent number, so the standard request with inclusion.block = latest + 1 failed with "invalid inclusion" and the profit was measured against the coinbase before overrides. Derive the next block env like eth_simulateV1 does, apply overrides first and check inclusion against the simulated block, matching flashbots' sbundle_api.
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mev_simBundleexecuted the bundle in the parent block's own environment and checked the inclusion range against the parent number, so the standard request withinclusion.block = latest + 1failed withinvalid inclusion, andcoinbase/baseFeewere read before the overrides were applied. The reference implementation (flashbotssbundle_api.go) simulates in the block that builds onparentBlock(number + 1, timestamp + 12, next base fee, then overrides) and checks inclusion against that block.Derives the next block env the same way
eth_simulateV1does, applies the overrides first and checks inclusion against the simulated block;stateBlockstill reports the parent.