diff --git a/src/js/dataLayer/mutations.js b/src/js/dataLayer/mutations.js
index 42941a74..98194be5 100644
--- a/src/js/dataLayer/mutations.js
+++ b/src/js/dataLayer/mutations.js
@@ -333,7 +333,7 @@ export class Mutations {
     const showLessInteraction = {
       item: postURI,
       event: "app.bsky.feed.defs#requestLess",
-      ...(feedContext ? { feedContext } : {}),
+      ...(feedContext != null ? { feedContext } : {}),
     };
     this.dataStore.$showLessInteractions.set([
       ...this.dataStore.$showLessInteractions.get(),
@@ -351,7 +351,7 @@ export class Mutations {
     const showMoreInteraction = {
       item: postURI,
       event: "app.bsky.feed.defs#requestMore",
-      ...(feedContext ? { feedContext } : {}),
+      ...(feedContext != null ? { feedContext } : {}),
     };
     // Note, we don't really need to store this interaction because we don't use it in the UI (yet).
     // But, let's do it anyway for consistency.
diff --git a/src/js/postSeenObserver.js b/src/js/postSeenObserver.js
index b0e85cf7..cc4d6a52 100644
--- a/src/js/postSeenObserver.js
+++ b/src/js/postSeenObserver.js
@@ -115,7 +115,7 @@ export class PostSeenObserver {
         await this.interactionsDispatch.sendInteraction({
           item: postUri,
           event: "app.bsky.feed.defs#interactionSeen",
-          feedContext,
+          ...(feedContext != null ? { feedContext } : {}),
         });
         this.seenPosts.add(postUri);
       } catch (error) {
diff --git a/src/js/templates/postFeed.template.js b/src/js/templates/postFeed.template.js
index 978104c0..ecfd44d6 100644
--- a/src/js/templates/postFeed.template.js
+++ b/src/js/templates/postFeed.template.js
@@ -226,7 +226,6 @@ export function postFeedTemplate({
             const content = html`<div
               class="feed-item"
               data-testid="feed-item"
-              data-feed-context="${feedItem.feedContext}"
               data-post-uri="${feedItem.post.uri}"
               data-feed-generator-uri="${feedGenerator?.uri ?? ""}"
             >
diff --git a/src/js/views/home.view.js b/src/js/views/home.view.js
index 10e9fde2..f62a71e7 100644
--- a/src/js/views/home.view.js
+++ b/src/js/views/home.view.js
@@ -211,6 +211,17 @@ class HomeView extends View {
       );
       const currentUser = dataLayer.derived.$currentUser.get();
       const pinnedItems = dataLayer.derived.$hydratedPinnedItems.get() ?? [];
+      // Map of feed items -> feedContexts for postSeenObserver
+      const feedContextsByFeedUri = new Map(
+        pinnedItems.map((item) => [
+          item.uri,
+          new Map(
+            (dataLayer.derived.$hydratedFeeds.get(item.uri)?.feed ?? []).map(
+              (feedItem) => [feedItem.post.uri, feedItem.feedContext ?? null],
+            ),
+          ),
+        ]),
+      );
       const currentFeedUri = state.$currentFeedUri.get();
       const currentFeedRequestStatus =
         dataLayer.requests.statusStore.$statuses.get(
@@ -291,10 +302,12 @@ class HomeView extends View {
       );
       const feedItems = document.querySelectorAll(".feed-item");
       feedItems.forEach((feedItem) => {
-        const { feedGeneratorUri, feedContext, postUri } = feedItem.dataset;
+        const { feedGeneratorUri, postUri } = feedItem.dataset;
         if (feedGeneratorUri) {
           const postSeenObserver = postSeenObservers.get(feedGeneratorUri);
           if (postSeenObserver) {
+            const feedContext =
+              feedContextsByFeedUri.get(feedGeneratorUri)?.get(postUri) ?? null;
             postSeenObserver.register(feedItem, postUri, feedContext);
           }
         }
diff --git a/tests/unit/specs/dataLayer/mutations.test.js b/tests/unit/specs/dataLayer/mutations.test.js
index 9fd5e3ea..05a888cd 100644
--- a/tests/unit/specs/dataLayer/mutations.test.js
+++ b/tests/unit/specs/dataLayer/mutations.test.js
@@ -3054,6 +3054,37 @@ describe("sendShowLessInteraction", () => {
     assert.deepEqual(stored.length, 2);
     assert.deepEqual(stored[1].item, postURI);
   });
+
+  it("should omit feedContext when null but keep an empty string", async () => {
+    const dataStore = new DataStore();
+    const patchStore = new PatchStore(dataStore);
+    const mockPreferencesProvider = {
+      requirePreferences: () => Preferences.createLoggedOutPreferences(),
+    };
+    const sentInteractions = [];
+    const mutations = makeMutations(
+      {
+        sendInteractions: async (interactions) => {
+          sentInteractions.push(...interactions);
+        },
+      },
+      dataStore,
+      patchStore,
+      mockPreferencesProvider,
+    );
+
+    await mutations.sendShowLessInteraction(postURI, null, feedProxyUrl);
+    await mutations.sendShowLessInteraction(postURI, "", feedProxyUrl);
+
+    assert.deepEqual(sentInteractions, [
+      { item: postURI, event: "app.bsky.feed.defs#requestLess" },
+      {
+        item: postURI,
+        event: "app.bsky.feed.defs#requestLess",
+        feedContext: "",
+      },
+    ]);
+  });
 });
 
 describe("sendShowMoreInteraction", () => {
diff --git a/tests/unit/specs/postSeenObserver.test.js b/tests/unit/specs/postSeenObserver.test.js
index f5648767..1ee9baca 100644
--- a/tests/unit/specs/postSeenObserver.test.js
+++ b/tests/unit/specs/postSeenObserver.test.js
@@ -115,6 +115,16 @@ describe("PostSeenObserver - seen tracking", () => {
     assert(observer.seenPosts.has(postUriA));
   });
 
+  it("omits feedContext from the interaction when it is null", async () => {
+    const { element } = createTrackedElement();
+    observer.register(element, postUriA, null);
+    await flushTimers();
+    assert.deepEqual(sendInteractions.mock.callCount(), 1);
+    assert.deepEqual(sendInteractions.mock.calls[0].arguments[0], [
+      { item: postUriA, event: "app.bsky.feed.defs#interactionSeen" },
+    ]);
+  });
+
   it("does not send an interaction for an off-screen post", async () => {
     const { element } = createTrackedElement({ top: 2000, bottom: 2100 });
     observer.register(element, postUriA, null);
diff --git a/tests/unit/specs/templates/postFeed.template.test.js b/tests/unit/specs/templates/postFeed.template.test.js
index 729a1bda..661a0419 100644
--- a/tests/unit/specs/templates/postFeed.template.test.js
+++ b/tests/unit/specs/templates/postFeed.template.test.js
@@ -115,18 +115,6 @@ describe("postFeedTemplate - feed with posts", () => {
     const feedItem = container.querySelector("[data-testid='feed-item']");
     assert(feedItem.getAttribute("data-post-uri") !== null);
   });
-
-  it("should set data-feed-context attribute on feed items", () => {
-    const result = postFeedTemplate({
-      feed: { feed: feed.slice(0, 1), cursor: null },
-      currentUser: mockUser,
-      postInteractionHandler,
-    });
-    const container = document.createElement("div");
-    render(result, container);
-    const feedItem = container.querySelector("[data-testid='feed-item']");
-    assert(feedItem.hasAttribute("data-feed-context"));
-  });
 });
 
 describe("postFeedTemplate - pagination", () => {