Why does echarts, set loop to false, to prevent the special effects from looping indefinitely? when the data is requested again, the data is not rendered, and why?

Why does echarts, set loop to false, to prevent the special effects from looping indefinitely? when the data is requested again, the data is not rendered, and why?
the following is the code to create the echarts instance and periodically request the ajax;, so when I set the loop, special effect in the created instance not to loop, but when the timing request for the second time, the data comes, it does not appear on the map, ask which old friend to answer! When the data is supposed to come, it needs to be re-rendered. Solve
bmap: {

.
                // center: [position.x,position.y],
                // zoom:17,
                roam: true,
                mapStyle: {
                    "styleJson": [{
                            "featureType": "water",
                            "elementType": "all",
                            "stylers": {
                                "color": "-sharp031628"
                            }
                        },
                        {
                            "featureType": "land",
                            "elementType": "geometry",
                            "stylers": {
                                "color": "-sharp000102"
                            }
                        },
                        {
                            "featureType": "highway",
                            "elementType": "all",
                            "stylers": {
                                "visibility": "off"
                            }
                        },
                        {
                            "featureType": "arterial",
                            "elementType": "geometry.fill",
                            "stylers": {
                                "color": "-sharp000000"
                            }
                        },
                        {
                            "featureType": "arterial",
                            "elementType": "geometry.stroke",
                            "stylers": {
                                "color": "-sharp0b3d51"
                            }
                        },
                        {
                            "featureType": "local",
                            "elementType": "geometry",
                            "stylers": {
                                "color": "-sharp000000"
                            }
                        },
                        {
                            "featureType": "railway",
                            "elementType": "geometry.fill",
                            "stylers": {
                                "color": "-sharp000000"
                            }
                        },
                        {
                            "featureType": "railway",
                            "elementType": "geometry.stroke",
                            "stylers": {
                                "color": "-sharp08304b"
                            }
                        },
                        {
                            "featureType": "subway",
                            "elementType": "geometry",
                            "stylers": {
                                "lightness": -70
                            }
                        },
                        {
                            "featureType": "building",
                            "elementType": "geometry.fill",
                            "stylers": {
                                "color": "-sharp000000"
                            }
                        },
                        {
                            "featureType": "all",
                            "elementType": "labels.text.fill",
                            "stylers": {
                                "color": "-sharp857f7f"
                            }
                        },
                        {
                            "featureType": "all",
                            "elementType": "labels.text.stroke",
                            "stylers": {
                                "color": "-sharp000000"
                            }
                        },
                        {
                            "featureType": "building",
                            "elementType": "geometry",
                            "stylers": {
                                "color": "-sharp022338"
                            }
                        },
                        {
                            "featureType": "green",
                            "elementType": "geometry",
                            "stylers": {
                                "color": "-sharp062032"
                            }
                        },
                        {
                            "featureType": "boundary",
                            "elementType": "all",
                            "stylers": {
                                "color": "-sharp465b6c"
                            }
                        },
                        {
                            "featureType": "manmade",
                            "elementType": "all",
                            "stylers": {
                                "color": "-sharp022338"
                            }
                        },
                        {
                            "featureType": "label",
                            "elementType": "all",
                            "stylers": {
                                "visibility": "off"
                            }
                        }
                    ]
                }
            },
            series: [{
                type: "lines",
                coordinateSystem: "bmap",
                polyline: true,
                data: busLines,
                silent: true,
                lineStyle: {
                    normal: {
                        // color: "-sharpc23531",
                        // color: "rgb(200, 35, 45)",
                        opacity: 0.2,
                        width: 1
                    }
                },
                progressiveThreshold: 500,  
                progressive: 200   //   
            }, {
                type: "lines",
                coordinateSystem: "bmap",
                polyline: true,
                data: busLines,
                lineStyle: {
                    normal: {
                        width: 0
                    }
                },
                effect: {   //  
                    constantSpeed: 2,  //  
                    // period:5,//
                    show: true,
                    // loop: false,  //
                    trailLength: 0.6,  //   
                    symbolSize: 1.5  //
                },
                zlevel: 1
            }]
        };

        if(centerFirst){
            option.bmap.center=[position.x,position.y]
            option.bmap.zoom=15
            centerFirst=false;
        }
        console.log(option.series[1].effect.constantSpeed); 
        mapEcharts.setOption(option);
       
        
        -sharp-sharp-sharp -sharp-sharp-sharp 

the environmental background of the problems and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

May.28,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3a713-2c207.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3a713-2c207.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?