Hello @khorwei ! Thank you for your patience and taking interest in using Coinbase Cloud. You may refer to this thread for your concern as you have similar queries.
It is also important to take note that sequence numbers may be greater or lesser than one integer value from the previous number as it may indicate that a message has been either dropped or arrived out of order. For more information, please visit the Websocket Overview documentation.
We hope this helps. Thank you!