When I use getBlockByNumber , hash Unable to check

[losedMemory]

pls ,

let web3 = try Web3.InfuraRopstenWeb3()
        let queue = web3.requestDispatcher.queue
        queue.async {
            do {
                let block = try? web3.eth.getBlockByNumber(UInt64(8991408),fullTransactions: true)
                print("result -- \(block)")
            } catch {
                
            }
        }

Optional(web3swift.Block(number: 8991408, hash: 32 bytes, parentHash: 32 bytes, nonce: Optional(8 bytes), sha3Uncles: 32 bytes, logsBloom: Optional(web3swift.EthereumBloomFilter(bytes: 256 bytes)), transactionsRoot: 32 bytes, stateRoot: 32 bytes, receiptsRoot: 32 bytes, miner: Optional(web3swift.EthereumAddress(_address: "0x05fc5a079e0583b8a07526023a16e2022c4c6296", type: web3swift.EthereumAddress.AddressType.normal)), difficulty: 861633615, totalDifficulty: 32019180529229072, extraData: 28 bytes, size: 1282, gasLimit: 8000029, gasUsed: 363236, timestamp: 2020-11-02 09:05:45 +0000, transactions: [web3swift.TransactionInBlock.transaction(Transaction
Nonce: 255
Gas price: 53000000000
Gas limit: 21000
To: 0xD063C6488dAC3733173E6fD6d27239464df30e5D
Value: 0
Data: 0xa9059cbb000000000000000000000000f056cbfd91d5e7ad8f428186c261366689ade12100000000000000000000000000000000000000000000000000000000001fa535
v: 41
r: 111306528176752701153592501826457129584515046434811502003588269096859364448536
s: 31764820737146994732133133002258175313324093061810692088640777569689599755057
Intrinsic chainID: Optional(3)
Infered chainID: Optional(3)
sender: Optional("0x39bc720C018a1dB3C38C2e6E17d6F26F9E7b46bb")
hash: Optional("0x1be2eed9329909f4a38411a4c8cd0bb2e51ef60e6068456029d4231c54effd9d")
), web3swift.TransactionInBlock.transaction(Transaction
Nonce: 10
Gas price: 5721815885
Gas limit: 21000
To: 0x12d845389E70AADBc054eF41AA326D69678F0388
Value: 1
Data: 0x
v: 41
r: 85728252517246383475874159471165951464217075821853301595031083990549396655797
s: 44438773711917494519883672516734374285751254037699630777298566728677134487853
Intrinsic chainID: Optional(3)
Infered chainID: Optional(3)
sender: Optional("0x27213fC2c0Db32b2b22aB00396d9938987330CaB")
hash: Optional("0x840a7e3222390f1c0fdbb6cf3b8e24f1f63ce0474eebe6a0327ebcc1f005653f")
), web3swift.TransactionInBlock.transaction(Transaction
Nonce: 1188
Gas price: 1600000000
Gas limit: 21000
To: 0x8f55EEa90f914Df7fff673F7f78aeb0aaDEC3bDa
Value: 0
Data: 0x1801fbe5c415b800b0951d56995ec9d6ae31dd03000000007bdc30b41849d69f828043a8000001c4790118bf858ed1695c25a4fb8eb18289472d1dd34db70e447cf3053c
v: 42
r: 69249556865622371411488297006406176889397960726132761025906010750804062810934
s: 2255420494968904699252620944624019632658157201644240470784484120096757883878
Intrinsic chainID: Optional(3)
Infered chainID: Optional(3)
sender: Optional("0x727824242d344e7b25A62fcdc40081f66346b3AF")
hash: Optional("0x3d3c7c28fd7bd845c23208e55981c59fb0b206afdd8b1d79a2d712fa3334896c")
), web3swift.TransactionInBlock.transaction(Transaction
Nonce: 1
Gas price: 1443631771
Gas limit: 21000
To: 0x6a599ae42ef01fA7641C23cB0cffe2414FAA297a
Value: 1000000000000000000
Data: 0xd0febe4c
v: 41
r: 74848861739711262939117588592280010671199439888877191302662162447749760162664
s: 50823065042415655951288500833614898433657731434939806164429578616341843015305
Intrinsic chainID: Optional(3)
Infered chainID: Optional(3)
sender: Optional("0x3B867befDa57597623F56442C5D53E600E412c24")
hash: Optional("0x372210e7261ffe776ea0fe3edcf5c8a76f2630d2bc6a6ffa8d6e4a6e85380e9a")
), web3swift.TransactionInBlock.transaction(Transaction
Nonce: 78
Gas price: 1443631771
Gas limit: 21000
To: 0xdb9E173Ae2734b2fB1EF69d1309E39F92A84c987
Value: 0
Data: 0xc2a672e0000000000000000000000000b7ae94efb23121f5ff9666104856d9c9d4143d6400000000000000000000000000000000000000000000001406064c7fc9428000
v: 41
r: 20217190886468106055153558721989280520143161745773049338122847759982735321775
s: 27433316939602930262401276528610485859039110732853832405384592050845283983994
Intrinsic chainID: Optional(3)
Infered chainID: Optional(3)
sender: Optional("0x5E47AD039a2d2A070E12157da86739a6E1A91cb8")
hash: Optional("0x290052c8a0f27bf517259a7b5e9a05fe2a9e0d7d92809838d335ce866938f5b7")
)], uncles: []))

but this result can't check hash in etherscan