Order book stream updateId is not in a row?

I opened an stream to listen to btcusdt@bookTicker, but I noticed that the updateIds are not in a row. There are jumps between Ids. Is it normal? How can I know if my websocket dismissed some data or not?
Please excuse my English and thanks for any suggestion.

It is normal to see that the order book update id is not sent in a sequence. Because the update id is created whenever there is a change in the order book. However, the stream only push it out when the best bid or ask’s price or quantity changes.

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