diff --git a/core/core.go b/core/core.go
index 825cac8..d3cc812 100644
--- a/core/core.go
+++ b/core/core.go
@@ -16,7 +16,7 @@ func NewCore(c *conf.CoreConfig) (Core, error) {
 	if types := strings.Split(c.Type, " "); len(types) > 1 {
 		var cs []Core
 		for _, t := range types {
-			f, ok := cores[strings.ToLower(c.Type)]
+			f, ok := cores[strings.ToLower(t)]
 			if !ok {
 				return nil, errors.New("unknown core type: " + t)
 			}
diff --git a/core/hy/resolver.go b/core/hy/resolver.go
index cc5edd9..e1eacbe 100644
--- a/core/hy/resolver.go
+++ b/core/hy/resolver.go
@@ -3,12 +3,11 @@ package hy
 import (
 	"crypto/tls"
 	"errors"
+	"github.com/Yuzuki616/hysteria/core/utils"
+	rdns "github.com/folbricht/routedns"
 	"net"
 	"net/url"
 	"strings"
-
-	"github.com/Yuzuki616/hysteria/core/utils"
-	rdns "github.com/folbricht/routedns"
 )
 
 var errInvalidSyntax = errors.New("invalid syntax")
diff --git a/core/xray/inbound.go b/core/xray/inbound.go
index 55e67b1..1060574 100644
--- a/core/xray/inbound.go
+++ b/core/xray/inbound.go
@@ -80,6 +80,9 @@ func buildInbound(config *conf.ControllerConfig, nodeInfo *panel.NodeInfo, tag s
 			if err != nil {
 				return nil, fmt.Errorf("marshal reality dest error: %s", err)
 			}
+			if len(config.CertConfig.RealityConfig.ShortIds) == 0 {
+				config.CertConfig.RealityConfig.ShortIds = []string{""}
+			}
 			in.StreamSetting.REALITYSettings = &coreConf.REALITYConfig{
 				Dest:         d,
 				Xver:         config.CertConfig.RealityConfig.Xver,
@@ -99,6 +102,9 @@ func buildInbound(config *conf.ControllerConfig, nodeInfo *panel.NodeInfo, tag s
 				if err != nil {
 					return nil, fmt.Errorf("marshal reality dest error: %s", err)
 				}
+				if len(rc.ShortIds) == 0 {
+					rc.ShortIds = []string{""}
+				}
 				Xver, _ := strconv.ParseUint(rc.Xver, 10, 64)
 				MaxTimeDiff, _ := strconv.ParseUint(rc.Xver, 10, 64)
 				in.StreamSetting.REALITYSettings = &coreConf.REALITYConfig{
diff --git a/node/cert.go b/node/cert.go
index ed79016..1df319c 100644
--- a/node/cert.go
+++ b/node/cert.go
@@ -28,6 +28,7 @@ func (c *Controller) requestCert() error {
 		if c.CertConfig.CertFile == "" || c.CertConfig.KeyFile == "" {
 			return fmt.Errorf("cert file path or key file path not exist")
 		}
+		return nil
 	case "dns", "http":
 		if c.CertConfig.CertFile == "" || c.CertConfig.KeyFile == "" {
 			return fmt.Errorf("cert file path or key file path not exist")
diff --git a/node/task.go b/node/task.go
index 8940dd1..d9ce94c 100644
--- a/node/task.go
+++ b/node/task.go
@@ -41,9 +41,9 @@ func (c *Controller) startTasks(node *panel.NodeInfo) {
 	}
 	if c.LimitConfig.EnableDynamicSpeedLimit {
 		c.traffic = make(map[string]int64)
-		c.renewCertPeriodic = &task.Task{
-			Interval: time.Duration(c.LimitConfig.DynamicSpeedLimitConfig.Periodic) * time.Minute,
-			Execute:  c.reportUserTrafficTask,
+		c.dynamicSpeedLimitPeriodic = &task.Task{
+			Interval: time.Duration(c.LimitConfig.DynamicSpeedLimitConfig.Periodic) * time.Second,
+			Execute:  c.SpeedChecker,
 		}
 	}
 }
@@ -204,7 +204,7 @@ func (c *Controller) nodeInfoMonitor() (err error) {
 	return nil
 }
 
-func (c *Controller) SpeedChecker() {
+func (c *Controller) SpeedChecker() error {
 	for u, t := range c.traffic {
 		if t >= c.LimitConfig.DynamicSpeedLimitConfig.Traffic {
 			err := c.limiter.UpdateDynamicSpeedLimit(c.tag, u,
@@ -214,4 +214,5 @@ func (c *Controller) SpeedChecker() {
 			delete(c.traffic, u)
 		}
 	}
+	return nil
 }