Source: [InteractiveBrokersBrokerage.cs#L3341](https://github.com/QuantConnect/Lean.Brokerages.InteractiveBrokers/blob/master/QuantConnect.InteractiveBrokersBrokerage/InteractiveBrokersBrokerage.cs#L3341) It's likely because `GetContractDetails(contract, symbol.Value)` is null. Unfortunate this isn't reproduced consistently: <img width="1083" height="218" alt="Image" src="https://github.com/user-attachments/assets/d9ab6984-af70-445d-9ff2-8350f30b9c5e" />
Source: InteractiveBrokersBrokerage.cs#L3341
It's likely because
GetContractDetails(contract, symbol.Value)is null.Unfortunate this isn't reproduced consistently: