diff --git a/frontend/app/player/web/MessageLoader.ts b/frontend/app/player/web/MessageLoader.ts
index 97e58fb0c..4b7487a44 100644
--- a/frontend/app/player/web/MessageLoader.ts
+++ b/frontend/app/player/web/MessageLoader.ts
@@ -45,7 +45,11 @@ export default class MessageLoader {
         const mobBytes = await decrypt(b);
         const data = unpack(mobBytes);
         fileReader.append(data);
-        fileReader.checkForIndexes();
+        if (file?.endsWith('EFS')) {
+          fileReader.forceSkipIndexes()
+        } else {
+         fileReader.checkForIndexes();
+        }
         const msgs: Array<PlayerMsg> = [];
         let finished = false;
         while (!finished) {
diff --git a/frontend/app/player/web/messages/MFileReader.ts b/frontend/app/player/web/messages/MFileReader.ts
index 268f18005..f34b2dc84 100644
--- a/frontend/app/player/web/messages/MFileReader.ts
+++ b/frontend/app/player/web/messages/MFileReader.ts
@@ -12,6 +12,7 @@ export default class MFileReader extends RawMessageReader {
   private currentTime: number
   public error: boolean = false
   private noIndexes: boolean = false
+  private skipIndexes: boolean = false
   constructor(data: Uint8Array, private startTime?: number, private logger= console) {
     super(data)
   }
@@ -29,6 +30,10 @@ export default class MFileReader extends RawMessageReader {
     }
   }
 
+  public forceSkipIndexes() {
+    this.skipIndexes = true
+  }
+
   private needSkipMessage(): boolean {
     if (this.p === 0) return false
     for (let i = 7; i >= 0; i--) {
@@ -56,6 +61,9 @@ export default class MFileReader extends RawMessageReader {
    * */
   private readRawMessage(): RawMessage | null {
     try {
+      if (this.skipIndexes) {
+        this.skip(8)
+      }
       return super.readMessage()
     } catch (e) {
       this.logger.error("Read message error:", e)