Missing some data in API when comparing data to binance order book.

[gauravmalik-sudo]

Hi All
I am using below api to get order book.
GET /api/v3/depth .
We hit this api on each 3 second. But when comparing our data with below url(Orderbook) . We are missing some entries. Can you please suggest me on this . Why all data is not fetched using api.
https://www.binance.com/en/orderbook/BTC_USDT

[spider_1]

Same problem but on stream:

missing data from "depthUpdate" event

in order to manage local order book i had subscribed to the stream: ‘wss://stream.binance.com:9443/ws/btcusdt@depth@100ms’, unfortunately i found that : Final update ID - First update ID + 1 != sum of updates ( bids + asks) Is this normal ???

[dino]

The orderbook from GET /api/v3/depth is the snapshot of the orderbook at the time of “lastUpdateId”. And the orderbook at https://www.binance.com/en/orderbook/BTC_USDT is a live updated orderbook. They can’t not be easily compared.