diff --git a/.changeset/fix-sandbox-identifier-persistence.md b/.changeset/fix-sandbox-identifier-persistence.md
new file mode 100644
index 00000000000..5efc9840116
--- /dev/null
+++ b/.changeset/fix-sandbox-identifier-persistence.md
@@ -0,0 +1,7 @@
+---
+'@aws-amplify/sandbox': patch
+---
+
+fix: maintain custom sandbox identifier after file changes
+
+The sandbox identifier provided via --identifier flag now persists throughout the entire session, including after file changes trigger rebuilds. Previously, the identifier would fall back to the default (whoami) value after file changes.
diff --git a/packages/sandbox/src/file_watching_sandbox.ts b/packages/sandbox/src/file_watching_sandbox.ts
index f5076416dfe..455ce275b16 100644
--- a/packages/sandbox/src/file_watching_sandbox.ts
+++ b/packages/sandbox/src/file_watching_sandbox.ts
@@ -221,7 +221,7 @@ export class FileWatchingSandbox extends EventEmitter implements Sandbox {
               this.filesChangesTracker.trackFileChange(filePath);
               if (latch === 'open') {
                 this.printer.clearConsole();
-                await this.printSandboxNameInfo();
+                await this.printSandboxNameInfo(options.identifier);
               }
               this.printer.log(
                 `[Sandbox] Triggered due to a file ${eventName} event: ${path.relative(