Place large order, but usually got stucks. Small orders are fine

Every time I place an order like this, I always get stuck. The small order is fine. I ask the customer service, and the other party answers the network question. I doubt that the background of Yihui is set up like this. This time, I saw that I had earned more than 20 yuan. I clicked to close the position. After clicking, I was stuck. . If it is only a 0.1 lot order, it is always normal. I don't know how others are, mine is always like this