diff --git a/package.json b/package.json
index c8d6463..8ed801f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ccstatusline",
-  "version": "2.0.5",
+  "version": "2.0.6",
   "description": "A customizable status line formatter for Claude Code CLI",
   "module": "src/ccstatusline.ts",
   "type": "module",
diff --git a/src/types/BlockMetrics.ts b/src/types/BlockMetrics.ts
index b634e51..c3845f9 100644
--- a/src/types/BlockMetrics.ts
+++ b/src/types/BlockMetrics.ts
@@ -1,5 +1,4 @@
 export interface BlockMetrics {
     startTime: Date;
     lastActivity: Date;
-    isActive: boolean;
 }
\ No newline at end of file
diff --git a/src/utils/jsonl.ts b/src/utils/jsonl.ts
index fd10070..0d7e08e 100644
--- a/src/utils/jsonl.ts
+++ b/src/utils/jsonl.ts
@@ -294,16 +294,18 @@ function findMostRecentBlockStartTime(
         // The current block started after the completed blocks
         blockStart = new Date(flooredWorkStart.getTime() + (completedBlocks * sessionDurationMs));
     }
-    const timeSinceActivity = now.getTime() - mostRecentTimestamp.getTime();
-    const blockEnd = new Date(blockStart.getTime() + sessionDurationMs);
 
-    // Check if block is still active
-    const isActive = timeSinceActivity < sessionDurationMs && now < blockEnd;
+    const blockEnd = new Date(blockStart.getTime() + sessionDurationMs);
+    const inBlockWindow = now.getTime() >= blockStart.getTime() && now.getTime() <= blockEnd.getTime();
+    const activityInThisBlock = mostRecentTimestamp.getTime() >= blockStart.getTime() && mostRecentTimestamp.getTime() <= now.getTime();
+
+    const isActive = inBlockWindow && activityInThisBlock;
+    if (!isActive)
+        return null;
 
     return {
         startTime: blockStart,
-        lastActivity: mostRecentTimestamp,
-        isActive
+        lastActivity: mostRecentTimestamp
     };
 }