Why is the interface called once and requested twice?

enters the page only once, but the breakpoint skips to this method and executes the method again after a request. What is the reason for this?

The order of

breakpoints is that they are called twice first and do not enter the method. After calling the method twice, I went into the method again, and then walked the method twice.

//
function getAllUsers(pagenum) {
    $.ajax({
        url: "/user/getAllUsers",
        data: {
            "pagenum": pagenum
        },
        type: "post",
        dataType: "json",
        success: function(data) {
            if (data.flag == "success") {
                $("tbody").html(" ")
                var list = data.Data;
                var count = data.count;
                //
                for (var i = 0; i < list.length; iPP) {

                    var num = i + (pagenum - 1) * 10 + 1; //

                    $("tbody").append(
                        `<tr id="${list[i].uid}">  
                        <td>${num}</td>   
                        <td class="accountName">${list[i].username}</td>   
                        <td class="accountPass">${list[i].password}</td>  
                        <td class="role">${list[i].rolename}</td> 
                        <td class="lastTime">${list[i].lastlogintime}</td> 
                        <td class="lastIP">${list[i].lastloginip}</td> 
                        <td><i class="fa fa-edit modify" data-toggle="modal" data-target="-sharpmodifyUserModal" title=""></i>
                            <i class="fa fa-trash-o deleteUser" title=""></i>
                        </td> 
                        </tr>
                     `
                    )
                }

                //
                layui.use(["laypage"], function() {

                    var laypage = layui.laypage;
                    // 
                    laypage.render({
                        elem: "layPage" // id
                            ,
                        layout: ["prev", "page", "next", "limits",
                                "count"
                            ] // 
                            ,
                        limit: 10 // 
                            ,
                        count: count // 
                            ,
                        curr: pagenum // 
                            ,
                        groups: 3 // 
                            ,
                        theme: "-sharp1E9FFF" // 
                            ,
                        skip: true // 
                            ,
                        jump: function(obj, first) { // 
                            if (!first) {
                                $("tbody").html("");
                                getUserLog(obj.curr)
                            }
                        }
                    });
                })
            } else {
                layer.msg("", {
                    offset: "3.8%",
                });
            }
        },
        error: function(XMLHttpRequest, textStatus, errorThrown) {
            console.log(XMLHttpRequest.status);
            console.log(XMLHttpRequest.readyState);
            console.log(textStatus);
        }
    })
}

$(function(){
    getAllUsers(1)
})