REST endpoint does not return correct Expiry header for GET opeartion when the key is stored via HotRod or embedded cache

public void testHotRodEmbeddedPutRestGetExpiry() throws Exception {
      final String key = "8";
      final String key2 = "9";

      // 1. Put with HotRod
      assertEquals(null, cacheFactory.getHotRodCache().put(key, "v1", 5, TimeUnit.SECONDS));

      // 2. Put with Embedded
      assertEquals(null, cacheFactory.getEmbeddedCache().put(key2, "v2", 5, TimeUnit.SECONDS));

      // 3. Get with REST key
      HttpMethod get1 = new GetMethod(cacheFactory.getRestUrl() + "/" + key);
      cacheFactory.getRestClient().executeMethod(get1);
      assertEquals(HttpServletResponse.SC_OK, get1.getStatusCode());
      assertNotNull(get1.getResponseHeader("Expires"));
//^^^fails here - returns null

      // 4. Get with REST key2
      HttpMethod get2 = new GetMethod(cacheFactory.getRestUrl() + "/" + key2);
      cacheFactory.getRestClient().executeMethod(get2);
      assertEquals(HttpServletResponse.SC_OK, get2.getStatusCode());
      assertNotNull(get2.getResponseHeader("Expires"));
//^^^fails here - returns null
   }