diff --git a/playwright/e2e/crypto/event-shields.spec.ts b/playwright/e2e/crypto/event-shields.spec.ts
index b5d3790aaae..c6382f1d726 100644
--- a/playwright/e2e/crypto/event-shields.spec.ts
+++ b/playwright/e2e/crypto/event-shields.spec.ts
@@ -16,6 +16,7 @@ import {
     logOutOfElement,
     verify,
 } from "./utils";
+import { bootstrapCrossSigningForClient } from "../../pages/client.ts";
 
 test.describe("Cryptography", function () {
     test.use({
@@ -307,5 +308,30 @@ test.describe("Cryptography", function () {
             const penultimate = page.locator(".mx_EventTile").filter({ hasText: "test encrypted from verified" });
             await expect(penultimate.locator(".mx_EventTile_e2eIcon")).not.toBeVisible();
         });
+
+        test("should show correct shields on events sent by users with changed identity", async ({
+            page,
+            app,
+            bot: bob,
+            homeserver,
+        }) => {
+            // Verify Bob
+            await verify(app, bob);
+
+            // Bob logs in a new device and resets cross-signing
+            const bobSecondDevice = await createSecondBotDevice(page, homeserver, bob);
+            await bootstrapCrossSigningForClient(await bobSecondDevice.prepareClient(), bob.credentials, true);
+
+            /* should show an error for a message from a previously verified device */
+            await bobSecondDevice.sendMessage(testRoomId, "test encrypted from user that was previously verified");
+            const last = page.locator(".mx_EventTile_last");
+            await expect(last).toContainText("test encrypted from user that was previously verified");
+            const lastE2eIcon = last.locator(".mx_EventTile_e2eIcon");
+            await expect(lastE2eIcon).toHaveClass(/mx_EventTile_e2eIcon_warning/);
+            await lastE2eIcon.focus();
+            await expect(await app.getTooltipForElement(lastE2eIcon)).toContainText(
+                "Sender's verified identity has changed",
+            );
+        });
     });
 });
diff --git a/src/components/views/rooms/EventTile.tsx b/src/components/views/rooms/EventTile.tsx
index 8b073688595..78d0ca5b28f 100644
--- a/src/components/views/rooms/EventTile.tsx
+++ b/src/components/views/rooms/EventTile.tsx
@@ -758,8 +758,13 @@ export class UnwrappedEventTile extends React.Component<EventTileProps, IState>
                     shieldReasonMessage = _t("encryption|event_shield_reason_mismatched_sender_key");
                     break;
 
-                default:
-                    shieldReasonMessage = _t("error|unknown");
+                case EventShieldReason.SENT_IN_CLEAR:
+                    shieldReasonMessage = _t("common|unencrypted");
+                    break;
+
+                case EventShieldReason.VERIFICATION_VIOLATION:
+                    shieldReasonMessage = _t("timeline|decryption_failure|sender_identity_previously_verified");
+                    break;
             }
 
             if (this.state.shieldColour === EventShieldColour.GREY) {
diff --git a/test/unit-tests/components/views/rooms/EventTile-test.tsx b/test/unit-tests/components/views/rooms/EventTile-test.tsx
index 4cb22967608..e57514904a2 100644
--- a/test/unit-tests/components/views/rooms/EventTile-test.tsx
+++ b/test/unit-tests/components/views/rooms/EventTile-test.tsx
@@ -301,6 +301,8 @@ describe("EventTile", () => {
             [EventShieldReason.UNKNOWN_DEVICE, "unknown or deleted device"],
             [EventShieldReason.AUTHENTICITY_NOT_GUARANTEED, "can't be guaranteed"],
             [EventShieldReason.MISMATCHED_SENDER_KEY, "Encrypted by an unverified session"],
+            [EventShieldReason.SENT_IN_CLEAR, "Not encrypted"],
+            [EventShieldReason.VERIFICATION_VIOLATION, "Sender's verified identity has changed"],
         ])("shows the correct reason code for %i (%s)", async (reasonCode: EventShieldReason, expectedText: string) => {
             mxEvent = await mkEncryptedMatrixEvent({
                 plainContent: { msgtype: "m.text", body: "msg1" },