diff --git a/e2e/slide-media-sync.spec.js b/e2e/slide-media-sync.spec.js
index bbcb9c51..65962b50 100644
--- a/e2e/slide-media-sync.spec.js
+++ b/e2e/slide-media-sync.spec.js
@@ -112,7 +112,7 @@ test.describe("Slide media sync", () => {
       images: ["/v2/media/1"],
       title: "Some text",
       separator: true,
-      contacts: [{ name: "John", image: ["/v2/media/2"] }],
+      contacts: [{ name: "John", image: ["/v2/media/2"], tags: ["news"] }],
     };
     const mediaFields = [];
 
@@ -120,7 +120,33 @@ test.describe("Slide media sync", () => {
 
     // images field is picked up via top-level scan
     expect(result).toContain("/v2/media/1");
-    // contacts is an array of objects, not strings — objects are skipped
-    expect(result).not.toContain("/v2/media/2");
+    expect(result).toContain("/v2/media/2");
+    expect(result).not.toContain("news");
+  });
+
+  test("It does not include non-media string arrays from content", () => {
+    // Only actual media IRIs should be returned.
+    const content = {
+      images: ["/v2/media/1"],
+      tags: ["news", "sports"],
+    };
+    const mediaFields = []; // rely on top-level scan
+
+    const result = rebuildMediaFromContent(content, mediaFields);
+
+    expect(result).toEqual(["/v2/media/1"]);
+    expect(result).not.toContain("news");
+    expect(result).not.toContain("sports");
+  });
+
+  test("It avoids infinite recursion when content contains circular references", () => {
+    const circular = { images: ["/v2/media/1"] };
+    circular.self = circular; // create an explicit cycle
+
+    // If we didn't track `seen`, this would crash.
+    expect(() => rebuildMediaFromContent(circular, [])).not.toThrow();
+
+    const result = rebuildMediaFromContent(circular, []);
+    expect(result).toContain("/v2/media/1");
   });
 });
diff --git a/src/components/slide/slide-media-utils.js b/src/components/slide/slide-media-utils.js
index 70d4df9e..67bfb0f4 100644
--- a/src/components/slide/slide-media-utils.js
+++ b/src/components/slide/slide-media-utils.js
@@ -15,21 +15,51 @@ export default function rebuildMediaFromContent(content, mediaFields) {
   const media = [];
   const fieldsToScan = new Set(mediaFields);
 
-  // Also scan top-level content keys to catch media fields not yet
-  // tracked via handleMedia (e.g. on first edit of another field).
+  const mediaIriRegex = /\/v2\/media\/.+/;
+
+  const isMediaIri = (value) =>
+    typeof value === "string" &&
+    !value.startsWith("TEMP--") &&
+    mediaIriRegex.test(value);
+
+  const collectMediaFromValue = (value, seen = new Set()) => {
+    // 1) Ignore empty values early (nothing to scan)
+    if (value === null || value === undefined) return;
+
+    // 2) If it's a string, it might be a media IRI; validate and collect it
+    if (typeof value === "string") {
+      if (isMediaIri(value)) media.push(value);
+      return;
+    }
+
+    // 3) If it's not an object (e.g. number/boolean/function), it cannot contain nested media
+    if (typeof value !== "object") return;
+
+    // 4) Defensive guard against circular references:
+    //    - JSON content won't have cycles, but runtime objects might.
+    //    - If we've seen this object/array already, stop to avoid infinite recursion.
+    if (seen.has(value)) return;
+    seen.add(value);
+
+    // 5) If it's an array, scan each element (elements can be strings, objects, or more arrays)
+    if (Array.isArray(value)) {
+      value.forEach((item) => collectMediaFromValue(item, seen));
+      return;
+    }
+
+    // 6) Otherwise it's a plain object: scan its property values recursively
+    Object.values(value).forEach((item) => collectMediaFromValue(item, seen));
+  };
+
+  // Also, scan top-level content keys to catch media fields not yet
+  // tracked via handleMedia (e.g. on the first edit of another field).
   if (content && typeof content === "object") {
     Object.keys(content).forEach((key) => fieldsToScan.add(key));
   }
 
   fieldsToScan.forEach((fieldName) => {
     const fieldData = get(content, fieldName);
-    if (Array.isArray(fieldData)) {
-      fieldData.forEach((mediaId) => {
-        if (typeof mediaId === "string" && !mediaId.startsWith("TEMP--")) {
-          media.push(mediaId);
-        }
-      });
-    }
+    collectMediaFromValue(fieldData);
   });
 
   return [...new Set(media)];