If you look at Coinsbit in low-volume-pairs, you will see that the orderbook keeps unchanged while in the history every same time interval a new trade appears.
Focus on stablecoin pairs with empty buy-orderbooks.
Interesting new trades in the history that never could happen.
Just look at coinsbit trades/orderbooks when Binance is down. You will see very interesting things.
Here you are absolutely right. This can be seen in many exchanges. Both Binance and Coinsbit are no exception.