diff --git a/src/lib/__tests__/query-keys.test.ts b/src/lib/__tests__/query-keys.test.ts
index 1e56d87d3..5b1e70f5f 100644
--- a/src/lib/__tests__/query-keys.test.ts
+++ b/src/lib/__tests__/query-keys.test.ts
@@ -250,6 +250,15 @@ describe("dependent-key bundles", () => {
     const keyStrings = medicationDependentKeys.map((k) => JSON.stringify(k));
     expect(keyStrings).toContain(JSON.stringify(["compliance-chart-inline"]));
   });
+
+  // v1.16.11 — the dashboard snapshot feeds the hero band, dose tally,
+  // verdict and checklist from ONE query with refetch-on-mount/focus
+  // off and a 120 s poll. Without this key in the bundle a dose taken
+  // from the dashboard stayed visibly due until the next poll (#316).
+  it("medicationDependentKeys bundles the dashboard snapshot (v1.16.11)", () => {
+    const keyStrings = medicationDependentKeys.map((k) => JSON.stringify(k));
+    expect(keyStrings).toContain(JSON.stringify(["dashboard", "snapshot"]));
+  });
 });
 
 /**
diff --git a/src/lib/query-keys/index.ts b/src/lib/query-keys/index.ts
index c91b1a386..e98e8d0a5 100644
--- a/src/lib/query-keys/index.ts
+++ b/src/lib/query-keys/index.ts
@@ -103,6 +103,14 @@ export const moodDependentKeys = [
  * `queryKeys.medicationDetail(id)` rides under the
  * `["medications"]` prefix already so a single medication invalidation
  * also evicts its detail-page read.
+ *
+ * v1.16.11 — `dashboardSnapshot` joins the bundle. The hero band, dose
+ * tally, verdict and checklist all read ONE snapshot query configured
+ * with refetchOnMount/WindowFocus off and a 120 s poll; without the key
+ * here a dose taken from the dashboard stayed visibly due for up to two
+ * minutes. The intake routes already hard-evict the server-side
+ * snapshot bucket, so the refetch this triggers returns post-write data
+ * immediately.
  */
 export const medicationDependentKeys = [
   queryKeys.medications(),
@@ -110,6 +118,7 @@ export const medicationDependentKeys = [
   queryKeys.insightsRoot(),
   queryKeys.insightsTargets(),
   queryKeys.gamificationAchievements(),
+  queryKeys.dashboardSnapshot(),
   ["dashboard-medication-compliance"] as const,
   ["compliance-chart-inline"] as const,
 ];