diff --git a/backend/src/app/http/assets.clj b/backend/src/app/http/assets.clj
index 13fba2617..3a0bf2144 100644
--- a/backend/src/app/http/assets.clj
+++ b/backend/src/app/http/assets.clj
@@ -64,6 +64,7 @@
         (yrs/response :status  307
                       :headers {"location" (str url)
                                 "x-host"   (cond-> host port (str ":" port))
+                                "x-mtype"  (:content-type mdata)
                                 "cache-control" (str "max-age=" (inst-ms cache-max-age))}))
 
       :fs
diff --git a/backend/src/app/util/websocket.clj b/backend/src/app/util/websocket.clj
index cd080e0d4..f16b4eddc 100644
--- a/backend/src/app/util/websocket.clj
+++ b/backend/src/app/util/websocket.clj
@@ -101,7 +101,8 @@
           (fn [_ error]
             (a/close! close-ch)
             (when-not (or (instance? java.nio.channels.ClosedChannelException error)
-                          (instance? java.net.SocketException error))
+                          (instance? java.net.SocketException error)
+                          (instance? java.io.IOException error))
               (l/error :hint (ex-message error) :cause error)))
 
           on-ws-message
diff --git a/docker/devenv/files/nginx.conf b/docker/devenv/files/nginx.conf
index 0d991d427..5e2065bb2 100644
--- a/docker/devenv/files/nginx.conf
+++ b/docker/devenv/files/nginx.conf
@@ -66,6 +66,7 @@ http {
             set $redirect_uri "$upstream_http_location";
             set $redirect_host "$upstream_http_x_host";
             set $redirect_cache_control "$upstream_http_cache_control";
+            set $real_mtype "$upstream_http_x_mtype";
 
             proxy_set_header Host "$redirect_host";
             proxy_hide_header etag;
@@ -75,9 +76,10 @@ http {
             proxy_hide_header x-amz-server-side-encryption;
             proxy_pass $redirect_uri;
 
-            #add_header x-internal-redirect "$redirect_uri";
-            #add_header x-cache-control "$redirect_cache_control";
-            #add_header cache-control "$redirect_cache_control";
+            add_header x-internal-redirect "$redirect_uri";
+            add_header x-cache-control "$redirect_cache_control";
+            add_header cache-control "$redirect_cache_control";
+            add_header content-type "$real_mtype";
         }
 
         location /assets {