Last Modified Header Missing in Dispatcher for AEM Assets

Hello
I’m facing an issue with AEM (Adobe Experience Manager) where the Last-Modified header appears when querying the publisher, but is missing when querying the dispatcher. Here are the details:

Publisher Request (Working)
root@ip pub:~# curl -I http://xx.x.xx-xxx:4503/content/dam/one/img/PCC+_IC_1.jpg
HTTP/1.1 200 OK
Date: Tue, 08 Apr 2025 18:07:46 GMT
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
Last-Modified: Fri, 10 Jan 2025 14:17:37 GMT
Content-Type: image/jpeg
Content-Length: 8381

Dispatcher Request (Missing Last-Modified)

root@ip Disp:~# curl -I http://xx.xx.xx-xxx/content/dam/one/img/PCC+_IC_1.jpg
HTTP/1.1 200 OK
Date: Tue, 08 Apr 2025 18:11:44 GMT
Server: Apache/2.4.52 (Ubuntu)
Age: 7003292
Accept-Ranges: bytes
Content-Length: 8381
Content-Type: image/jpeg

Issue: As shown in the example, the Last-Modified header is present in the response from the AEM publisher but is missing when accessed through the dispatcher.

Has anyone else experienced this? How can I resolve it so that the Last-Modified header is visible in the dispatcher response as well?

Thanks!