Problem using Blockchain Websocket API

[HelenKhaykovich]

Hello,
I try to use WebSocket API to get notifications about new unconfirmed bitcoin transactions ( subscribing to wss://ws.blockchain.info/inv with
{"op": "unconfirmed_sub"} ).
Everything works perfectly except that in the transaction data all tr_index fields have value 0, so I can't get the input transaction data correctly. Below an example of the trx I'm getting.
Could you please help me to find out how to fix this problem?

"op":"utx","x":{"lock_time":691712,"ver":2,"size":519,"inputs":[{"sequence":4294967294,"prev_out":{"spent":false,"tx_index":0,"type":0,"addr":"16rNHDJGCr1AF1di2AmcoEZWhDW6r1yta7","value":1410000,"n":4,"script":"76a914402ec63817be13807f168b8fe5b636380639004488ac"},
"script":"47304402204a35f99f26cd83d889f90966445c73d87234fa408e92545e8ff520cf0acd1830022070b5447dd52bc115bd492048b40b2cf238fc39507b5a6d9c5a28f83524eef7360121020705228d4d987b192f2553850af53a52dd9f8efb20946b8be20c5fdd0cfb2a44"},
{"sequence":4294967294,"prev_out":{"spent":false,"tx_index":0,"type":0,"addr":"1DQVrDXYhg2cF4U8oebun4tboSPkVWjb8T","value":110000,"n":1,"script":"76a914881328783805d7924525be9fb61609ea5cf9781388ac"},"script":"483045022100b5404e486e2254a4f311781440b2235c2081d6a4596114ac8d9413265b1f6ba802200fdd24c81d6b19b25ac34aca054a6e56d53e4acf5b79b13ad202f62e760b52cb0121034db3f39c7a092f7662075ca78c6962bb3989dab669fcde82f04585e4368aa8ce"},{"sequence":4294967294,"prev_out":{"spent":false,"tx_index":0,"type":0,"addr":"17p7cAMCNRH9Jzh3Yidg1mY9r1411iYxYT","value":148000,"n":0,"script":"76a9144ab9d1cb3e324b94cb80be7791d835a891248bdc88ac"},"script":"483045022100c711916c5b963fbfa05d393d66e05adcbecbfa7e85dc34a6f80e000a5cd123280220048abba527f2ea0cc1041209ff88f85f44da55493a5ec9705429f7d907ae29fb012103888f7df7a377f85750aa9f1dece1af682a31535ff205a4bf51e36ed844c32f00"}],
"time":1626694146,
"tx_index":0,
"vin_sz":3,
"hash":"5bb988ac204d1d95c8dde2186dcc026aaed64ad5b694879e46f661d9e30a95af",
"vout_sz":2,
"relayed_by":"",
"out":[{"spent":false,"tx_index":0,"type":0,"addr":"31spfJ7BMtaH1KKqXPjyS6ZzqCFVX2ebj5","value":668000,"n":0,"script":"a914020b2c7d50a2342f599013080215f64affbd657d87"},{"spent":false,"tx_index":0,"type":0,"addr":"12GBytrYwWxpAFoJic6w4ZpHMdiiSB2p6S","value":948000,"n":1,"script":"76a9140dd78818f4cfbb15157e16b33e60e12dfd1e8dbf88ac"}]}}

[LS20221]

I think you could look at "n": 0 as index