diff --git a/CHANGES.md b/CHANGES.md
index 24072cbcc..c4a354c03 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -39,6 +39,7 @@ Release Notes.
 * Fix CVE in the uninstrumented gateways configs, when activating the dynamic configuration feature.
 * Fix CVE in the Apdex threshold configs, when activating the dynamic configuration feature.
 * Make the codes and doc consistent in sharding server and core server.
+* Fix that chunked string is incorrect while the tag contains colon
 
 #### UI
 * Fix incorrect label in radial chart in topology.
diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/avg/AvgHistogramPercentileFunction.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/avg/AvgHistogramPercentileFunction.java
index 3f3e2b254..3d06d8603 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/avg/AvgHistogramPercentileFunction.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/avg/AvgHistogramPercentileFunction.java
@@ -194,8 +194,8 @@ public abstract class AvgHistogramPercentileFunction extends Metrics implements
             dataset.keys().stream()
                 .map(key -> {
                     if (key.contains(":")) {
-                        String[] kk = key.split(":");
-                        return Tuple.of(kk[0], key);
+                        int index = key.lastIndexOf(":");
+                        return Tuple.of(key.substring(0, index), key.substring(index + 1));
                     } else {
                         return Tuple.of(DEFAULT_GROUP, key);
                     }