trace_call not working with Nethermind

[JuusoAsd]

Version
2.0.10
Platform
MACOS

Description
Middleware.trace_call does not work with Nethermind at least on pending transactions.

let provider = Provider::<Ws>::connect(address).await.unwrap();
let mut tx_hash_stream = provider.subscribe_full_pending_txs().await.unwrap();
let tx = tx_hash_stream.next().await.unwrap();
loop {
    match provider
        .trace_call(&tx, vec![TraceType::StateDiff], Some(BlockNumber::Latest))
        .await
    {
        Ok(traces) => {
            println!("Ok: {:?}", traces.state_diff);
        }
        Err(e) => {
            println!("Error tracing the transaction: {}", e);
        }
    }
}

The code results in: Error tracing the transaction: invalid type: null, expected a string at line 1 column 14

When interacting with the node directly with curl, an example response looks like this:

{"jsonrpc":"2.0","result":{"output":null,"stateDiff":{"0xdac17f958d2ee523a2206206994597c13d831ec7":{"balance":"=","code":"=","nonce":"=","storage":{"0x02ed89f7e64402c46ce0e6975e59967cbe9ee50ad233e3d28d5ee84d620b4c5b":{"*":{"from":"0x00000000000000000000000000000000000000000000000000000005f667e340","to":"0x00000000000000000000000000000000000000000000000000000008d698da80"}},"0x86900fad2cf71703c8ee91de06d5eb287d58b1d3247df86ebdf446794a40ee6c":{"*":{"from":"0x000000000000000000000000000000000000000000000000000009ac8de27890","to":"0x000000000000000000000000000000000000000000000000000009a9adb18150"}}}},"0xe795d3de925c970cbef7c691f9c39505202afaca":{"balance":"=","code":"=","nonce":{"*":{"from":"0xaec","to":"0xaed"}},"storage":{}}},"trace":[],"vmTrace":null},"id":1} 

The output field of result is null, however BlockTrace returned by trace_call requires output field to be Bytes. After changing it to Option<Bytes>, this works as expected.

BlockTrace:
https://github.com/gakonst/ethers-rs/blob/90b87bd85be98caa8bb592b67f3f9acbc8a409cf/ethers-core/src/types/trace/mod.rs#L29C1-L45C2

Nethermind version:

Version: 1.20.2+62f034ed
Commit: 62f034ed4de657c09b9b9a0a660b66b4f4c7e353
Build Date: 2023-08-30 06:45:03Z
OS: Linux x64
Runtime: .NET 7.0.10